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4.00x+15.00=3.50(30+x)
We move all terms to the left:
4.00x+15.00-(3.50(30+x))=0
We add all the numbers together, and all the variables
4.00x-(3.50(x+30))+15.00=0
We add all the numbers together, and all the variables
4.00x-(3.50(x+30))+15=0
We calculate terms in parentheses: -(3.50(x+30)), so:We get rid of parentheses
3.50(x+30)
We multiply parentheses
3.5x+105
Back to the equation:
-(3.5x+105)
4.00x-3.5x-105+15=0
We add all the numbers together, and all the variables
0.5x-90=0
We move all terms containing x to the left, all other terms to the right
0.5x=90
x=90/0.5
x=180
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