5r^2+5=130

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Solution for 5r^2+5=130 equation: 


Simplifying
5r2 + 5 = 130

Reorder the terms:
5 + 5r2 = 130

Solving
5 + 5r2 = 130

Solving for variable 'r'.

Move all terms containing r to the left, all other terms to the right.

Add '-5' to each side of the equation.
5 + -5 + 5r2 = 130 + -5

Combine like terms: 5 + -5 = 0
0 + 5r2 = 130 + -5
5r2 = 130 + -5

Combine like terms: 130 + -5 = 125
5r2 = 125

Divide each side by '5'.
r2 = 25

Simplifying
r2 = 25

Take the square root of each side:
r = {-5, 5}

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