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Simplifying
3(x2 + 4) = 27
Reorder the terms:
3(4 + x2) = 27
(4 * 3 + x2 * 3) = 27
(12 + 3x2) = 27
Solving
12 + 3x2 = 27
Solving for variable 'x'.
Move all terms containing x to the left, all other terms to the right.
Add '-12' to each side of the equation.
12 + -12 + 3x2 = 27 + -12
Combine like terms: 12 + -12 = 0
0 + 3x2 = 27 + -12
3x2 = 27 + -12
Combine like terms: 27 + -12 = 15
3x2 = 15
Divide each side by '3'.
x2 = 5
Simplifying
x2 = 5
Take the square root of each side:
x = {-2.236067978, 2.236067978}
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