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Simplifying
9x2 + 8 = 72
Reorder the terms:
8 + 9x2 = 72
Solving
8 + 9x2 = 72
Solving for variable 'x'.
Move all terms containing x to the left, all other terms to the right.
Add '-8' to each side of the equation.
8 + -8 + 9x2 = 72 + -8
Combine like terms: 8 + -8 = 0
0 + 9x2 = 72 + -8
9x2 = 72 + -8
Combine like terms: 72 + -8 = 64
9x2 = 64
Divide each side by '9'.
x2 = 7.111111111
Simplifying
x2 = 7.111111111
Take the square root of each side:
x = {-2.666666667, 2.666666667}
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