Solve for x
x=30
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2x-40-\left(-x\right)=50
To find the opposite of 40-x, find the opposite of each term.
2x-40+x=50
The opposite of -x is x.
3x-40=50
Combine 2x and x to get 3x.
3x=50+40
Add 40 to both sides.
3x=90
Add 50 and 40 to get 90.
x=\frac{90}{3}
Divide both sides by 3.
x=30
Divide 90 by 3 to get 30.
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