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Lesson 5: Two-step equations with decimals and fractions

# Find the mistake: two-step equations

When doing algebra, we sometimes make mistakes! It's important to be able to check our own work (and other people's work) for correctness.

## Want to join the conversation?

• If they made a mistake translating step 1 into step 2, where would you mark the mistake?
• I believe step 2
• dont you wish math waseasy
• yes because math is hard
• On the first problem, i got 0.5 as the answer. Is this a mistake or did I do something wrong?
• you got it wrong but to know if you got it right or wrong so with o.5 if you had it in their it would be 9(2.0.5+1/3)=39 so no because 2 times 0.5 is 1 plus 1/3 is 1 1/3 and 9 times 1 1/3 is 12 not 39
• So if you have to take from both sides you have to add or subtract. Or can you do both.
• this is so confusing. do you divide by the distributed or follow the distributive property? in khan, they switch back and forth!
• when it comes to (ex) distributive property, Khan sometimes divides or doesn't divide by the distributor. aren't you supposed to DIVIDE by it?
• Yes?
• a agree that at there was a mistake in step 1
• i got 1777777777 did i get it right
• i dont think you did
(1 vote)
• Hello does anyone know how to check your work in solving two step equations