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54(3x+18)=90
We move all terms to the left:
54(3x+18)-(90)=0
We multiply parentheses
162x+972-90=0
We add all the numbers together, and all the variables
162x+882=0
We move all terms containing x to the left, all other terms to the right
162x=-882
x=-882/162
x=-5+4/9
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