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### Course: Operations and Algebraic Thinking 222-226>Unit 2

Lesson 6: Two-step equation word problems

# Two-step equation word problem: oranges

Learn how to solve a word problem by writing an equation to model the situation. In this video, we use the linear equation 210(t-5) = 41,790. Created by Sal Khan.

## Want to join the conversation?

• Whoa, how does Sal do that complex division using MENTAL MATH? Can someone tell me his strategy of doing math that easily?
• He does Vedic Math
• wait so how is 41,970 divided by 210 the same as 42,840 divided by 210
• It isnt, 41970÷210 is 199 as sal showed he added 5 to it
• Nah jit tripping thinking I understand dis.
• fax no shot broski think im dat smart
• I kind of need some help here. I'm having trouble evaluating the two-step equations the way Kahn wants me to and it's marking me wrong whenever I evaluate it differently. I try to do it the way Kahn wants but it's so confusing and I don't get it.
Also why is it marking me wrong when my answer is correct, but it's just my formula that's different? Can't there be more than one acceptable way of evaluating things if the answer is still correct?

I talked to my mom and she says it seems correct to her so I should report it as a problem, so I did. But now I feel bad because the problem is with me and not Kahn. Kahn explains it but I just don't get it that way.

• At least on the final two step equations word problems, the answer that you do have to get both the question and answer correct to get the question right. One issue that could cause problems is that you are not using the variable that they ask you to use. I found this out when I got the correct equation, but used x instead of q. While you could possibly have multiple ways of analyzing these word problems, the practice requires a two (or possibly 3 step equation if you have parentheses and you distribute first) step equation, so if you are trying to write it as a one-step equation, it will be wrong.
I was able to get numerous questions correct, but I have many years of math behind me.
The only way to find if your equations look good is to state a specific problem (I remember the orange tree problem, the number of test questions, and the cake problems).
• this is not that easy than i was thinking how to they to it?
• Sal writes so perfectly. Why is that
• because he has a special styles mouse pad that helps him write like he wold on paper
• I am confused with this video. In class I didn't get what my teacher was saying so I thought this would help me I searched for this abt the same question in class but after all I'd rather continue in school than watch this again.
Someone repeat this question in an easier way to understand!!
Thanks if u can help
• somone said that he does vedic math in his head can someone tell me what vedic math is please
• Vedic Math is a collection of Methods or Sutras to solve numerical computations quickly and faster.

You can search it online.
• How to determine which operation to use??

I know how to slove but dont know how to set the word problem up have a bad struggle in that,