7x^2-31-20=0

Solution for 7x^2-31-20=0 equation:

Simplifying
7x2 + -31 + -20 = 0

Reorder the terms:
-31 + -20 + 7x2 = 0

Combine like terms: -31 + -20 = -51
-51 + 7x2 = 0

Solving
-51 + 7x2 = 0

Solving for variable 'x'.

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

Add '51' to each side of the equation.
-51 + 51 + 7x2 = 0 + 51

Combine like terms: -51 + 51 = 0
0 + 7x2 = 0 + 51
7x2 = 0 + 51

Combine like terms: 0 + 51 = 51
7x2 = 51

Divide each side by '7'.
x2 = 7.285714286

Simplifying
x2 = 7.285714286

Take the square root of each side:
x = {-2.699206233, 2.699206233}