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8r+3=7r-(-r-3)
We simplify the equation to the form, which is simple to understand
8r+3=7r-(-r-3)
Remove unnecessary parentheses
8r+3=7r+1r+3
We move all terms containing r to the left and all other terms to the right.
+8r-7r-1r=+3-3
We simplify left and right side of the equation.
r=0
0=0
This equation is an identity, so all real numbers are solutions.
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