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Simplifying
9r2 + 7 = 232
Reorder the terms:
7 + 9r2 = 232
Solving
7 + 9r2 = 232
Solving for variable 'r'.
Move all terms containing r to the left, all other terms to the right.
Add '-7' to each side of the equation.
7 + -7 + 9r2 = 232 + -7
Combine like terms: 7 + -7 = 0
0 + 9r2 = 232 + -7
9r2 = 232 + -7
Combine like terms: 232 + -7 = 225
9r2 = 225
Divide each side by '9'.
r2 = 25
Simplifying
r2 = 25
Take the square root of each side:
r = {-5, 5}
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