x^2-13=87

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Solution for x^2-13=87 equation: 


Simplifying
x2 + -13 = 87

Reorder the terms:
-13 + x2 = 87

Solving
-13 + x2 = 87

Solving for variable 'x'.

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

Add '13' to each side of the equation.
-13 + 13 + x2 = 87 + 13

Combine like terms: -13 + 13 = 0
0 + x2 = 87 + 13
x2 = 87 + 13

Combine like terms: 87 + 13 = 100
x2 = 100

Simplifying
x2 = 100

Take the square root of each side:
x = {-10, 10}

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