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90x+60(x+10)=x
We move all terms to the left:
90x+60(x+10)-(x)=0
We add all the numbers together, and all the variables
89x+60(x+10)=0
We multiply parentheses
89x+60x+600=0
We add all the numbers together, and all the variables
149x+600=0
We move all terms containing x to the left, all other terms to the right
149x=-600
x=-600/149
x=-4+4/149
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