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26-40=-9x+7x
We move all terms to the left:
26-40-(-9x+7x)=0
We add all the numbers together, and all the variables
-(-2x)+26-40=0
We add all the numbers together, and all the variables
-(-2x)-14=0
We get rid of parentheses
2x-14=0
We move all terms containing x to the left, all other terms to the right
2x=14
x=14/2
x=7
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