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0.13x+0.03(50.000-x)=6.000
We move all terms to the left:
0.13x+0.03(50.000-x)-(6.000)=0
We add all the numbers together, and all the variables
0.13x+0.03(-1x+50)-6=0
We multiply parentheses
0.13x-0.03x+1.5-6=0
We add all the numbers together, and all the variables
0.1x-4.5=0
We move all terms containing x to the left, all other terms to the right
0.1x=4.5
x=4.5/0.1
x=45
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