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2x+12+x/4+6=90
We move all terms to the left:
2x+12+x/4+6-(90)=0
We add all the numbers together, and all the variables
2x+x/4-72=0
We multiply all the terms by the denominator
2x*4+x-72*4=0
We add all the numbers together, and all the variables
x+2x*4-288=0
Wy multiply elements
x+8x-288=0
We add all the numbers together, and all the variables
9x-288=0
We move all terms containing x to the left, all other terms to the right
9x=288
x=288/9
x=32
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