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0.3(x+20)-0.03(x-60)=18.6
We move all terms to the left:
0.3(x+20)-0.03(x-60)-(18.6)=0
We add all the numbers together, and all the variables
0.3(x+20)-0.03(x-60)-18.6=0
We multiply parentheses
0.3x-0.03x+6+1.8-18.6=0
We add all the numbers together, and all the variables
0.27x-10.8=0
We move all terms containing x to the left, all other terms to the right
0.27x=10.8
x=10.8/0.27
x=40
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