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4 + 1.50r = 25
We simplify the equation to the form, which is simple to understand
4+1.50r=25
We move all terms containing r to the left and all other terms to the right.
+1.5r=+25-4
We simplify left and right side of the equation.
+1.5r=+21
We divide both sides of the equation by 1.5 to get r.
r=14
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