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x-24.4+x=90
We move all terms to the left:
x-24.4+x-(90)=0
We add all the numbers together, and all the variables
2x-114.4=0
We move all terms containing x to the left, all other terms to the right
2x=114.4
x=114.4/2
x=57+0.40000000000001/2
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