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(2x+1)+(x+-170)=90
We move all terms to the left:
(2x+1)+(x+-170)-(90)=0
We add all the numbers together, and all the variables
(2x+1)+(x-170)-90=0
We get rid of parentheses
2x+x+1-170-90=0
We add all the numbers together, and all the variables
3x-259=0
We move all terms containing x to the left, all other terms to the right
3x=259
x=259/3
x=86+1/3
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