-3(1-7a)=7a-31

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Solution for -3(1-7a)=7a-31 equation: 



-3(1-7a)=7a-31

We move all terms to the left:

-3(1-7a)-(7a-31)=0

We add all the numbers together, and all the variables

-3(-7a+1)-(7a-31)=0

We multiply parentheses

21a-(7a-31)-3=0

We get rid of parentheses

21a-7a+31-3=0

We add all the numbers together, and all the variables

14a+28=0

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

14a=-28

a=-28/14

a=-2

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