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Simplifying
9x2 + 9 = 28
Reorder the terms:
9 + 9x2 = 28
Solving
9 + 9x2 = 28
Solving for variable 'x'.
Move all terms containing x to the left, all other terms to the right.
Add '-9' to each side of the equation.
9 + -9 + 9x2 = 28 + -9
Combine like terms: 9 + -9 = 0
0 + 9x2 = 28 + -9
9x2 = 28 + -9
Combine like terms: 28 + -9 = 19
9x2 = 19
Divide each side by '9'.
x2 = 2.111111111
Simplifying
x2 = 2.111111111
Take the square root of each side:
x = {-1.452966314, 1.452966314}
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