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150-(2x-9)=x
We move all terms to the left:
150-(2x-9)-(x)=0
We add all the numbers together, and all the variables
-1x-(2x-9)+150=0
We get rid of parentheses
-1x-2x+9+150=0
We add all the numbers together, and all the variables
-3x+159=0
We move all terms containing x to the left, all other terms to the right
-3x=-159
x=-159/-3
x=+53
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