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7+3r=1+4r
We simplify the equation to the form, which is simple to understand
7+3r=1+4r
We move all terms containing r to the left and all other terms to the right.
+3r-4r=+1-7
We simplify left and right side of the equation.
-1r=-6
We divide both sides of the equation by -1 to get r.
r=6
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