4(-5a+7)=168

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Solution for 4(-5a+7)=168 equation: 



4(-5a+7)=168

We move all terms to the left:

4(-5a+7)-(168)=0

We multiply parentheses

-20a+28-168=0

We add all the numbers together, and all the variables

-20a-140=0

We move all terms containing a to the left, all other terms to the right

-20a=140

a=140/-20

a=-7

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