y^2+7-20=0

Solution for y^2+7-20=0 equation:

Simplifying
y2 + 7 + -20 = 0

Reorder the terms:
7 + -20 + y2 = 0

Combine like terms: 7 + -20 = -13
-13 + y2 = 0

Solving
-13 + y2 = 0

Solving for variable 'y'.

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

Add '13' to each side of the equation.
-13 + 13 + y2 = 0 + 13

Combine like terms: -13 + 13 = 0
0 + y2 = 0 + 13
y2 = 0 + 13

Combine like terms: 0 + 13 = 13
y2 = 13

Simplifying
y2 = 13

Take the square root of each side:
y = {-3.605551275, 3.605551275}