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2x+8x-20=90
We simplify the equation to the form, which is simple to understand
2x+8x-20=90
We move all terms containing x to the left and all other terms to the right.
+2x+8x=+90+20
We simplify left and right side of the equation.
+10x=+110
We divide both sides of the equation by 10 to get x.
x=11
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