42-7(x=3)

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Solution for 42-7(x=3) equation: 



42-7(x=3)

We move all terms to the left:

42-7(x-(3))=0

We multiply parentheses

-7x+21+42=0

We add all the numbers together, and all the variables

-7x+63=0

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

-7x=-63

x=-63/-7

x=+9

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