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8x+2(3x+4)+6=90
We move all terms to the left:
8x+2(3x+4)+6-(90)=0
We add all the numbers together, and all the variables
8x+2(3x+4)-84=0
We multiply parentheses
8x+6x+8-84=0
We add all the numbers together, and all the variables
14x-76=0
We move all terms containing x to the left, all other terms to the right
14x=76
x=76/14
x=5+3/7
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