7x-42=4x-12

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Solution for 7x-42=4x-12 equation: 



7x-42=4x-12

We move all terms to the left:

7x-42-(4x-12)=0

We get rid of parentheses

7x-4x+12-42=0

We add all the numbers together, and all the variables

3x-30=0

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

3x=30

x=30/3

x=10

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