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Simplifying
2r2 + 12 + -7 = 5
Reorder the terms:
12 + -7 + 2r2 = 5
Combine like terms: 12 + -7 = 5
5 + 2r2 = 5
Add '-5' to each side of the equation.
5 + -5 + 2r2 = 5 + -5
Combine like terms: 5 + -5 = 0
0 + 2r2 = 5 + -5
2r2 = 5 + -5
Combine like terms: 5 + -5 = 0
2r2 = 0
Solving
2r2 = 0
Solving for variable 'r'.
Move all terms containing r to the left, all other terms to the right.
Divide each side by '2'.
r2 = 0
Simplifying
r2 = 0
Take the square root of each side:
r = {0}
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