https://www.khanacademy.org/math/algebra-home/alg-basic-eq-ineq/alg-old-school-equations/v/solving-for-a-variable 2023-11-15T19:12:44.061361401Z Solving an equation for a variable The perimeter of a rectangle is equal to 2 times the length plus 2 times the width. We can solve for the length by isolating it on one side of the equation. We do this by subtracting 2 times the width from both sides, and then dividing both sides by 2. This gives us the formula for the length. Sal Khan video https://cdn.kastatic.org/googleusercontent/AD_5bDSm3hEPKltqtrepqYu3xLvodFs7jkNnN9c6PkCaTC4eFuVvvKHKaCXZxo5zWeXCu_6YJvgS4mX6FTSqpmQ Solving an equation for a variable The perimeter of a rectangle is equal to 2 times the length plus 2 times the width. We can solve for the length by isolating it on one side of the equation. We do this by subtracting 2 times the width from both sides, and then dividing both sides by 2. This gives us the formula for the length. https://cdn.kastatic.org/ka-youtube-converted/fnuIT7EhAvs.mp4/fnuIT7EhAvs.mp4 84 Subject of Formula https://www.khanacademy.org/math/algebra/x2f8bb11595b61c86:solve-equations-inequalities/x2f8bb11595b61c86:linear-eqns-unknown-coefficients/v/linear-equations-with-unknown-coefficients 2022-10-06T23:01:00.745424633Z Linear equations with unknown coefficients Sal solves the equations ax+3x=bx+5 and a(5-x)=bx-8 for x. Note that these equations include other unknowns (a and b) but we solve them for x. video https://cdn.kastatic.org/ka_thumbnails_cache/81d106d7-dc4b-410a-9f7d-5d11f618f1f4_1280_720_base.png Linear equations with unknown coefficients Sal solves the equations ax+3x=bx+5 and a(5-x)=bx-8 for x. Note that these equations include other unknowns (a and b) but we solve them for x. https://cdn.kastatic.org/ka-youtube-converted/adPgapI-h3g.mp4/adPgapI-h3g.mp4 335 Subject of Formula https://www.khanacademy.org/math/algebra/x2f8bb11595b61c86:solve-equations-inequalities/x2f8bb11595b61c86:linear-eqns-unknown-coefficients/e/solving_for_a_variable 2023-12-12T00:32:03.629852833Z Linear equations with unknown coefficients Solve a linear equation where the coefficients are represented by letters. Sid Patel exercise https://www.khanacademy.org/math/algebra2/x2ec2f6f830c9fb89:modeling/x2ec2f6f830c9fb89:manipulating-formulas/v/example-of-solving-for-a-variable 2021-06-29T20:27:55Z Manipulating formulas: perimeter Sal rewrites the formula for the perimeter of a rectangle so it is solved for width. Sal Khan video https://cdn.kastatic.org/googleusercontent/1FHsxIJKUe6C4zCxsOy_fhInnHjHD7yEWrsk-mkvV5L-vVDI4iVSmnKHWnebKppN1gaqDOC3-LEVSCTPUYOC6RZE Manipulating formulas: perimeter Sal rewrites the formula for the perimeter of a rectangle so it is solved for width. https://cdn.kastatic.org/ka-youtube-converted/Aig1hkq3OsU.mp4/Aig1hkq3OsU.mp4 418 Subject of Formula https://www.khanacademy.org/math/algebra2/x2ec2f6f830c9fb89:modeling/x2ec2f6f830c9fb89:manipulating-formulas/v/rearrange-formulas-to-isolate-specific-variables 2021-06-29T20:27:53Z Manipulating formulas: area Sal rewrites the formula for the area of a triangle so it is solved for height. Sal Khan video https://cdn.kastatic.org/googleusercontent/cWwn-2xPGVuAd_qFHg43JNHer-Qe9jYYaF4XvjLTDOyu38xgOOC98jN6N8Ni43MzFaUy8UXfTdMQxiBKNsYPyfLR Manipulating formulas: area Sal rewrites the formula for the area of a triangle so it is solved for height. https://cdn.kastatic.org/ka-youtube-converted/eTSVTTg_QZ4.mp4/eTSVTTg_QZ4.mp4 149 Subject of Formula https://www.khanacademy.org/math/algebra2/x2ec2f6f830c9fb89:modeling/x2ec2f6f830c9fb89:manipulating-formulas/v/solving-for-a-variable-2 2021-06-30T18:10:05Z Manipulating formulas: temperature Sal takes the formula for converting from Fahrenheit temperature to Celsius, and solves it for F so it serves to convert from Celsius to Fahrenheit. Sal Khan video https://cdn.kastatic.org/googleusercontent/SHRO-zfXpAhYG7nntQGM0Fkbsjm1zrKHZPGS8q7tFL_SAwULEMdbHroU3ok8HpzYtTUAc9sWbpmPIycHOSG3H4zw9w Manipulating formulas: temperature Sal takes the formula for converting from Fahrenheit temperature to Celsius, and solves it for F so it serves to convert from Celsius to Fahrenheit. https://cdn.kastatic.org/ka-youtube-converted/BR5yFOt0zao.mp4/BR5yFOt0zao.mp4 161 Subject of Formula https://www.khanacademy.org/math/algebra2/x2ec2f6f830c9fb89:modeling/x2ec2f6f830c9fb89:manipulating-formulas/e/manipulating-formulas 2021-08-05T16:56:59.817978281Z Manipulate formulas Solve multi-variable formulas for a specific variable in order to solve some word problems. Stacy Beaudoin exercise