42=(-4a)+6

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Solution for 42=(-4a)+6 equation: 



42=(-4a)+6

We move all terms to the left:

42-((-4a)+6)=0



We calculate terms in parentheses: -((-4a)+6), so:

(-4a)+6

We get rid of parentheses

-4a+6

Back to the equation:

-(-4a+6)



We get rid of parentheses

4a-6+42=0

We add all the numbers together, and all the variables

4a+36=0

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

4a=-36

a=-36/4

a=-9

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