y^2-18=7

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Solution for y^2-18=7 equation: 


Simplifying
y2 + -18 = 7

Reorder the terms:
-18 + y2 = 7

Solving
-18 + y2 = 7

Solving for variable 'y'.

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

Add '18' to each side of the equation.
-18 + 18 + y2 = 7 + 18

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

Combine like terms: 7 + 18 = 25
y2 = 25

Simplifying
y2 = 25

Take the square root of each side:
y = {-5, 5}

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