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x+-0.1x=136.98
We move all terms to the left:
x+-0.1x-(136.98)=0
We add all the numbers together, and all the variables
0.9x-136.98=0
We move all terms containing x to the left, all other terms to the right
0.9x=136.98
x=136.98/0.9
x=152+0.18/0.9
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