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Simplifying
9x2 + 6 = 15
Reorder the terms:
6 + 9x2 = 15
Solving
6 + 9x2 = 15
Solving for variable 'x'.
Move all terms containing x to the left, all other terms to the right.
Add '-6' to each side of the equation.
6 + -6 + 9x2 = 15 + -6
Combine like terms: 6 + -6 = 0
0 + 9x2 = 15 + -6
9x2 = 15 + -6
Combine like terms: 15 + -6 = 9
9x2 = 9
Divide each side by '9'.
x2 = 1
Simplifying
x2 = 1
Take the square root of each side:
x = {-1, 1}
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