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0.03x+0.18(15-x)=1.2
We move all terms to the left:
0.03x+0.18(15-x)-(1.2)=0
We add all the numbers together, and all the variables
0.03x+0.18(-1x+15)-(1.2)=0
We add all the numbers together, and all the variables
0.03x+0.18(-1x+15)-1.2=0
We multiply parentheses
0.03x-0.18x+2.7-1.2=0
We add all the numbers together, and all the variables
-0.15x+1.5=0
We move all terms containing x to the left, all other terms to the right
-0.15x=-1.5
x=-1.5/-0.15
x=+10
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