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2x+3+x/3=90
We move all terms to the left:
2x+3+x/3-(90)=0
We add all the numbers together, and all the variables
2x+x/3-87=0
We multiply all the terms by the denominator
2x*3+x-87*3=0
We add all the numbers together, and all the variables
x+2x*3-261=0
Wy multiply elements
x+6x-261=0
We add all the numbers together, and all the variables
7x-261=0
We move all terms containing x to the left, all other terms to the right
7x=261
x=261/7
x=37+2/7
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