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8x+9=18x-79
We move all terms to the left:
8x+9-(18x-79)=0
We get rid of parentheses
8x-18x+79+9=0
We add all the numbers together, and all the variables
-10x+88=0
We move all terms containing x to the left, all other terms to the right
-10x=-88
x=-88/-10
x=8+4/5
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