7x+42=3x-18

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Solution for 7x+42=3x-18 equation: 



7x+42=3x-18

We move all terms to the left:

7x+42-(3x-18)=0

We get rid of parentheses

7x-3x+18+42=0

We add all the numbers together, and all the variables

4x+60=0

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

4x=-60

x=-60/4

x=-15

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