4+2x^2+x^2-x^2=22

Solution for 4+2x^2+x^2-x^2=22 equation:

Simplifying
4 + 2x2 + x2 + -1x2 = 22

Combine like terms: 2x2 + x2 = 3x2
4 + 3x2 + -1x2 = 22

Combine like terms: 3x2 + -1x2 = 2x2
4 + 2x2 = 22

Solving
4 + 2x2 = 22

Solving for variable 'x'.

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

Add '-4' to each side of the equation.
4 + -4 + 2x2 = 22 + -4

Combine like terms: 4 + -4 = 0
0 + 2x2 = 22 + -4
2x2 = 22 + -4

Combine like terms: 22 + -4 = 18
2x2 = 18

Divide each side by '2'.
x2 = 9

Simplifying
x2 = 9

Take the square root of each side:
x = {-3, 3}