7y^2+15-18=0

Solution for 7y^2+15-18=0 equation:

Simplifying
7y2 + 15 + -18 = 0

Reorder the terms:
15 + -18 + 7y2 = 0

Combine like terms: 15 + -18 = -3
-3 + 7y2 = 0

Solving
-3 + 7y2 = 0

Solving for variable 'y'.

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

Add '3' to each side of the equation.
-3 + 3 + 7y2 = 0 + 3

Combine like terms: -3 + 3 = 0
0 + 7y2 = 0 + 3
7y2 = 0 + 3

Combine like terms: 0 + 3 = 3
7y2 = 3

Divide each side by '7'.
y2 = 0.4285714286

Simplifying
y2 = 0.4285714286

Take the square root of each side:
y = {-0.654653671, 0.654653671}