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1/3=90-x
We move all terms to the left:
1/3-(90-x)=0
We add all the numbers together, and all the variables
-(-1x+90)+1/3=0
We get rid of parentheses
1x-90+1/3=0
We multiply all the terms by the denominator
1x*3+1-90*3=0
We add all the numbers together, and all the variables
1x*3-269=0
Wy multiply elements
3x-269=0
We move all terms containing x to the left, all other terms to the right
3x=269
x=269/3
x=89+2/3
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