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x+4x=49.2
We move all terms to the left:
x+4x-(49.2)=0
We add all the numbers together, and all the variables
5x-49.2=0
We move all terms containing x to the left, all other terms to the right
5x=49.2
x=49.2/5
x=9+3.5/4.1666666666667
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