-4*(a-12)+7=42

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Solution for -4*(a-12)+7=42 equation: 



-4(a-12)+7=42

We move all terms to the left:

-4(a-12)+7-(42)=0

We add all the numbers together, and all the variables

-4(a-12)-35=0

We multiply parentheses

-4a+48-35=0

We add all the numbers together, and all the variables

-4a+13=0

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

-4a=-13

a=-13/-4

a=3+1/4

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