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2x+x/2=90.
We move all terms to the left:
2x+x/2-(90.)=0
We add all the numbers together, and all the variables
2x+x/2-90=0
We multiply all the terms by the denominator
2x*2+x-90*2=0
We add all the numbers together, and all the variables
x+2x*2-180=0
Wy multiply elements
x+4x-180=0
We add all the numbers together, and all the variables
5x-180=0
We move all terms containing x to the left, all other terms to the right
5x=180
x=180/5
x=36
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