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7x-87=188+4x
We move all terms to the left:
7x-87-(188+4x)=0
We add all the numbers together, and all the variables
7x-(4x+188)-87=0
We get rid of parentheses
7x-4x-188-87=0
We add all the numbers together, and all the variables
3x-275=0
We move all terms containing x to the left, all other terms to the right
3x=275
x=275/3
x=91+2/3
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