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8+2x-15=9.
We move all terms to the left:
8+2x-15-(9.)=0
We add all the numbers together, and all the variables
2x+8-15-9=0
We add all the numbers together, and all the variables
2x-16=0
We move all terms containing x to the left, all other terms to the right
2x=16
x=16/2
x=8
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