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x+2xx+3xx=20
We simplify the equation to the form, which is simple to understand
x+2x+3x=20
We move all terms containing x to the left and all other terms to the right.
+1x+2x+3x=+20
We simplify left and right side of the equation.
+6x=+20
We divide both sides of the equation by 6 to get x.
x=3.33333333333
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