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0.75x+0.15=90
We move all terms to the left:
0.75x+0.15-(90)=0
We add all the numbers together, and all the variables
0.75x-89.85=0
We move all terms containing x to the left, all other terms to the right
0.75x=89.85
x=89.85/0.75
x=119+0.6/0.75
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