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15.50=5+1.50r
We simplify the equation to the form, which is simple to understand
15.50=5+1.50r
We move all terms containing r to the left and all other terms to the right.
-1.5r=+5-15.5
We simplify left and right side of the equation.
-1.5r=-10.5
We divide both sides of the equation by -01.5 to get r.
r=7
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