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r/3+7-r/5=-3
We simplify the equation to the form, which is simple to understand
r/3+7-r/5=-3
Simplifying:
+ 0.333333333333r+7-r/5=-3
Simplifying:
+ 0.333333333333r+7-0.2r=-3
We move all terms containing r to the left and all other terms to the right.
+ 0.333333333333r-0.2r=-3-7
We simplify left and right side of the equation.
+ 0.133333333333r=-10
We divide both sides of the equation by 0.133333333333 to get r.
r=-75
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