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Simplifying
-16 = x2 + -2 + -15
Reorder the terms:
-16 = -2 + -15 + x2
Combine like terms: -2 + -15 = -17
-16 = -17 + x2
Solving
-16 = -17 + x2
Solving for variable 'x'.
Move all terms containing x to the left, all other terms to the right.
Add '-1x2' to each side of the equation.
-16 + -1x2 = -17 + x2 + -1x2
Combine like terms: x2 + -1x2 = 0
-16 + -1x2 = -17 + 0
-16 + -1x2 = -17
Add '16' to each side of the equation.
-16 + 16 + -1x2 = -17 + 16
Combine like terms: -16 + 16 = 0
0 + -1x2 = -17 + 16
-1x2 = -17 + 16
Combine like terms: -17 + 16 = -1
-1x2 = -1
Divide each side by '-1'.
x2 = 1
Simplifying
x2 = 1
Take the square root of each side:
x = {-1, 1}
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