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Simplifying
9x2 + 21 = 188
Reorder the terms:
21 + 9x2 = 188
Solving
21 + 9x2 = 188
Solving for variable 'x'.
Move all terms containing x to the left, all other terms to the right.
Add '-21' to each side of the equation.
21 + -21 + 9x2 = 188 + -21
Combine like terms: 21 + -21 = 0
0 + 9x2 = 188 + -21
9x2 = 188 + -21
Combine like terms: 188 + -21 = 167
9x2 = 167
Divide each side by '9'.
x2 = 18.55555556
Simplifying
x2 = 18.55555556
Take the square root of each side:
x = {-4.307615995, 4.307615995}
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