3x=4x-87

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Solution for 3x=4x-87 equation: 



3x=4x-87

We move all terms to the left:

3x-(4x-87)=0

We get rid of parentheses

3x-4x+87=0

We add all the numbers together, and all the variables

-1x+87=0

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

-x=-87

x=-87/-1

x=+87

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