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-x/1.5=21
We simplify the equation to the form, which is simple to understand
-x/1.5=21
We move all terms containing x to the left and all other terms to the right.
-0.66666666666667x=+21
We simplify left and right side of the equation.
-0.66666666666667x=+21
We divide both sides of the equation by -0.66666666666667 to get x.
x=-31.5
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