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r/7-54=-51
We simplify the equation to the form, which is simple to understand
r/7-54=-51
Simplifying:
+ 0.142857142857r-54=-51
We move all terms containing r to the left and all other terms to the right.
+ 0.142857142857r=-51+54
We simplify left and right side of the equation.
+ 0.142857142857r=+3
We divide both sides of the equation by 0.142857142857 to get r.
r=21
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