3*x+5=7*x-7

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Solution for 3*x+5=7*x-7 equation: 



3x+5=7x-7

We move all terms to the left:

3x+5-(7x-7)=0

We get rid of parentheses

3x-7x+7+5=0

We add all the numbers together, and all the variables

-4x+12=0

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

-4x=-12

x=-12/-4

x=+3

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