Solve for x
x=50
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3x-20+x=180
Add x to both sides.
4x-20=180
Combine 3x and x to get 4x.
4x=180+20
Add 20 to both sides.
4x=200
Add 180 and 20 to get 200.
x=\frac{200}{4}
Divide both sides by 4.
x=50
Divide 200 by 4 to get 50.
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