Pearson Algebra 1 Common Core, 2011
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Pearson Algebra 1 Common Core, 2011 View details
8. An Introduction to Equations
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Exercise 30 Page 56

What do you have to take from 7 to get 4?

y=3

Practice makes perfect
To solve this equation using mental math we want to think about what it means in words. Let's rewrite the given equation as a sentence.

4 = 7 - y You get 4 when you take a number away from7 What number gives us 4 when we take it from 7? 3 does.