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x+x+10+2x-30=180
We simplify the equation to the form, which is simple to understand
x+x+10+2x-30=180
We move all terms containing x to the left and all other terms to the right.
+1x+1x+2x=+180-10+30
We simplify left and right side of the equation.
+4x=+200
We divide both sides of the equation by 4 to get x.
x=50
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