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8x+7x-4x=5+6
We move all terms to the left:
8x+7x-4x-(5+6)=0
We add all the numbers together, and all the variables
8x+7x-4x-11=0
We add all the numbers together, and all the variables
11x-11=0
We move all terms containing x to the left, all other terms to the right
11x=11
x=11/11
x=1
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