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x+8x+x=30
We simplify the equation to the form, which is simple to understand
x+8x+x=30
We move all terms containing x to the left and all other terms to the right.
+1x+8x+1x=+30
We simplify left and right side of the equation.
+10x=+30
We divide both sides of the equation by 10 to get x.
x=3
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