3x+15=7x-75

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Solution for 3x+15=7x-75 equation: 



3x+15=7x-75

We move all terms to the left:

3x+15-(7x-75)=0

We get rid of parentheses

3x-7x+75+15=0

We add all the numbers together, and all the variables

-4x+90=0

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

-4x=-90

x=-90/-4

x=22+1/2

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