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0.2x+21=49.6
We move all terms to the left:
0.2x+21-(49.6)=0
We add all the numbers together, and all the variables
0.2x-28.6=0
We move all terms containing x to the left, all other terms to the right
0.2x=28.6
x=28.6/0.2
x=143
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