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80x+30(1.5x)=4050
We move all terms to the left:
80x+30(1.5x)-(4050)=0
We add all the numbers together, and all the variables
80x+30(+1.5x)-4050=0
We multiply parentheses
80x+30x-4050=0
We add all the numbers together, and all the variables
110x-4050=0
We move all terms containing x to the left, all other terms to the right
110x=4050
x=4050/110
x=36+9/11
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