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12+0.2x=26.4=0.7x
We move all terms to the left:
12+0.2x-(26.4)=0
We add all the numbers together, and all the variables
0.2x-14.4=0
We move all terms containing x to the left, all other terms to the right
0.2x=14.4
x=14.4/0.2
x=72
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