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4-2.50x=21.50
We simplify the equation to the form, which is simple to understand
4-2.50x=21.50
We move all terms containing x to the left and all other terms to the right.
-2.5x=+21.5-4
We simplify left and right side of the equation.
-2.5x=+17.5
We divide both sides of the equation by -2.5 to get x.
x=-7
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