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8-7x=4+5x
We move all terms to the left:
8-7x-(4+5x)=0
We add all the numbers together, and all the variables
-7x-(5x+4)+8=0
We get rid of parentheses
-7x-5x-4+8=0
We add all the numbers together, and all the variables
-12x+4=0
We move all terms containing x to the left, all other terms to the right
-12x=-4
x=-4/-12
x=1/3
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