Solve for x
x=100
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2x-20=180
Combine x and x to get 2x.
2x=180+20
Add 20 to both sides.
2x=200
Add 180 and 20 to get 200.
x=\frac{200}{2}
Divide both sides by 2.
x=100
Divide 200 by 2 to get 100.
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