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0.80x+0.40(70)=0.40(64)
We move all terms to the left:
0.80x+0.40(70)-(0.40(64))=0
We add all the numbers together, and all the variables
0.80x+0.0006=0
We move all terms containing x to the left, all other terms to the right
0.80x=-0.0006
x=-0.0006/0.80
x=-0.0006/0.80
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