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0.15x+0.10(240-x)=28.25
We move all terms to the left:
0.15x+0.10(240-x)-(28.25)=0
We add all the numbers together, and all the variables
0.15x+0.10(-1x+240)-(28.25)=0
We add all the numbers together, and all the variables
0.15x+0.10(-1x+240)-28.25=0
We multiply parentheses
0.15x-0.1x+24-28.25=0
We add all the numbers together, and all the variables
0.05x-4.25=0
We move all terms containing x to the left, all other terms to the right
0.05x=4.25
x=4.25/0.05
x=85
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