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90=16x-7+4x+3
We move all terms to the left:
90-(16x-7+4x+3)=0
We add all the numbers together, and all the variables
-(20x-4)+90=0
We get rid of parentheses
-20x+4+90=0
We add all the numbers together, and all the variables
-20x+94=0
We move all terms containing x to the left, all other terms to the right
-20x=-94
x=-94/-20
x=4+7/10
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