w^2-7=18

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Solution for w^2-7=18 equation: 


Simplifying
w2 + -7 = 18

Reorder the terms:
-7 + w2 = 18

Solving
-7 + w2 = 18

Solving for variable 'w'.

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

Add '7' to each side of the equation.
-7 + 7 + w2 = 18 + 7

Combine like terms: -7 + 7 = 0
0 + w2 = 18 + 7
w2 = 18 + 7

Combine like terms: 18 + 7 = 25
w2 = 25

Simplifying
w2 = 25

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

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