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Simplifying
72 + -2z2 = 0
Solving
72 + -2z2 = 0
Solving for variable 'z'.
Move all terms containing z to the left, all other terms to the right.
Add '-72' to each side of the equation.
72 + -72 + -2z2 = 0 + -72
Combine like terms: 72 + -72 = 0
0 + -2z2 = 0 + -72
-2z2 = 0 + -72
Combine like terms: 0 + -72 = -72
-2z2 = -72
Divide each side by '-2'.
z2 = 36
Simplifying
z2 = 36
Take the square root of each side:
z = {-6, 6}
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