y^2-64=7

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Solution for y^2-64=7 equation: 


Simplifying
y2 + -64 = 7

Reorder the terms:
-64 + y2 = 7

Solving
-64 + y2 = 7

Solving for variable 'y'.

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

Add '64' to each side of the equation.
-64 + 64 + y2 = 7 + 64

Combine like terms: -64 + 64 = 0
0 + y2 = 7 + 64
y2 = 7 + 64

Combine like terms: 7 + 64 = 71
y2 = 71

Simplifying
y2 = 71

Take the square root of each side:
y = {-8.426149773, 8.426149773}

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