7r^2+8=36

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Solution for 7r^2+8=36 equation: 


Simplifying
7r2 + 8 = 36

Reorder the terms:
8 + 7r2 = 36

Solving
8 + 7r2 = 36

Solving for variable 'r'.

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

Add '-8' to each side of the equation.
8 + -8 + 7r2 = 36 + -8

Combine like terms: 8 + -8 = 0
0 + 7r2 = 36 + -8
7r2 = 36 + -8

Combine like terms: 36 + -8 = 28
7r2 = 28

Divide each side by '7'.
r2 = 4

Simplifying
r2 = 4

Take the square root of each side:
r = {-2, 2}

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