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7x+9x-84=63-5
We move all terms to the left:
7x+9x-84-(63-5)=0
We add all the numbers together, and all the variables
7x+9x-84-58=0
We add all the numbers together, and all the variables
16x-142=0
We move all terms containing x to the left, all other terms to the right
16x=142
x=142/16
x=8+7/8
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