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70+20x+22.91x=241.64
We move all terms to the left:
70+20x+22.91x-(241.64)=0
We add all the numbers together, and all the variables
42.91x-171.64=0
We move all terms containing x to the left, all other terms to the right
42.91x=171.64
x=171.64/42.91
x=4
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