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0.15x+10(50-x)=0.12(50)
We move all terms to the left:
0.15x+10(50-x)-(0.12(50))=0
We add all the numbers together, and all the variables
0.15x+10(-1x+50)-(0.125)=0
We add all the numbers together, and all the variables
0.15x+10(-1x+50)-0.125=0
We multiply parentheses
0.15x-10x+500-0.125=0
We add all the numbers together, and all the variables
-9.85x+499.875=0
We move all terms containing x to the left, all other terms to the right
-9.85x=-499.875
x=-499.875/-9.85
x=50+5.3636363636364/7.1636363636364
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