20x^2-140=180

Solution for 20x^2-140=180 equation:

Simplifying
20x2 + -140 = 180

Reorder the terms:
-140 + 20x2 = 180

Solving
-140 + 20x2 = 180

Solving for variable 'x'.

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

Add '140' to each side of the equation.
-140 + 140 + 20x2 = 180 + 140

Combine like terms: -140 + 140 = 0
0 + 20x2 = 180 + 140
20x2 = 180 + 140

Combine like terms: 180 + 140 = 320
20x2 = 320

Divide each side by '20'.
x2 = 16

Simplifying
x2 = 16

Take the square root of each side:
x = {-4, 4}