3r^2-16-7=5

Solution for 3r^2-16-7=5 equation:

Simplifying
3r2 + -16 + -7 = 5

Reorder the terms:
-16 + -7 + 3r2 = 5

Combine like terms: -16 + -7 = -23
-23 + 3r2 = 5

Solving
-23 + 3r2 = 5

Solving for variable 'r'.

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

Add '23' to each side of the equation.
-23 + 23 + 3r2 = 5 + 23

Combine like terms: -23 + 23 = 0
0 + 3r2 = 5 + 23
3r2 = 5 + 23

Combine like terms: 5 + 23 = 28
3r2 = 28

Divide each side by '3'.
r2 = 9.333333333

Simplifying
r2 = 9.333333333

Take the square root of each side:
r = {-3.055050463, 3.055050463}