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0.10x+0.15(50-x)=50+0.12+0.12(50)
We move all terms to the left:
0.10x+0.15(50-x)-(50+0.12+0.12(50))=0
We add all the numbers together, and all the variables
0.10x+0.15(-1x+50)-(50.245)=0
We add all the numbers together, and all the variables
0.10x+0.15(-1x+50)-50.245=0
We multiply parentheses
0.10x-0.15x+7.5-50.245=0
We add all the numbers together, and all the variables
-0.05x-42.745=0
We move all terms containing x to the left, all other terms to the right
-0.05x=42.745
x=42.745/-0.05
x=-854+0.045/0.05
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