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73.2+0.2x=75
We move all terms to the left:
73.2+0.2x-(75)=0
We add all the numbers together, and all the variables
0.2x-1.8=0
We move all terms containing x to the left, all other terms to the right
0.2x=1.8
x=1.8/0.2
x=9
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