7x+3(-3x+20)=42

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Solution for 7x+3(-3x+20)=42 equation: 



7x+3(-3x+20)=42

We move all terms to the left:

7x+3(-3x+20)-(42)=0

We multiply parentheses

7x-9x+60-42=0

We add all the numbers together, and all the variables

-2x+18=0

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

-2x=-18

x=-18/-2

x=+9

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