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8x+3x-2x=7+2
We move all terms to the left:
8x+3x-2x-(7+2)=0
We add all the numbers together, and all the variables
8x+3x-2x-9=0
We add all the numbers together, and all the variables
9x-9=0
We move all terms containing x to the left, all other terms to the right
9x=9
x=9/9
x=1
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