7r^2-31+30=

Solution for 7r^2-31+30= equation:

Simplifying
7r2 + -31 + 30 = 0

Reorder the terms:
-31 + 30 + 7r2 = 0

Combine like terms: -31 + 30 = -1
-1 + 7r2 = 0

Solving
-1 + 7r2 = 0

Solving for variable 'r'.

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

Add '1' to each side of the equation.
-1 + 1 + 7r2 = 0 + 1

Combine like terms: -1 + 1 = 0
0 + 7r2 = 0 + 1
7r2 = 0 + 1

Combine like terms: 0 + 1 = 1
7r2 = 1

Divide each side by '7'.
r2 = 0.1428571429

Simplifying
r2 = 0.1428571429

Take the square root of each side:
r = {-0.377964473, 0.377964473}