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0.04x+13=0.4x=-8.6
We move all terms to the left:
0.04x+13-(0.4x)=0
We add all the numbers together, and all the variables
0.04x-(+0.4x)+13=0
We get rid of parentheses
0.04x-0.4x+13=0
We add all the numbers together, and all the variables
-0.36x+13=0
We move all terms containing x to the left, all other terms to the right
-0.36x=-13
x=-13/-0.36
x=36+0.040000000000001/0.36
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