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(8x-23)+(8-2x)=90
We move all terms to the left:
(8x-23)+(8-2x)-(90)=0
We add all the numbers together, and all the variables
(8x-23)+(-2x+8)-90=0
We get rid of parentheses
8x-2x-23+8-90=0
We add all the numbers together, and all the variables
6x-105=0
We move all terms containing x to the left, all other terms to the right
6x=105
x=105/6
x=17+1/2
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