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40x+90-30=107
We simplify the equation to the form, which is simple to understand
40x+90-30=107
We move all terms containing x to the left and all other terms to the right.
+40x=+107-90+30
We simplify left and right side of the equation.
+40x=+47
We divide both sides of the equation by 40 to get x.
x=1.175
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