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Simplifying
3x2 + 13 = 121
Reorder the terms:
13 + 3x2 = 121
Solving
13 + 3x2 = 121
Solving for variable 'x'.
Move all terms containing x to the left, all other terms to the right.
Add '-13' to each side of the equation.
13 + -13 + 3x2 = 121 + -13
Combine like terms: 13 + -13 = 0
0 + 3x2 = 121 + -13
3x2 = 121 + -13
Combine like terms: 121 + -13 = 108
3x2 = 108
Divide each side by '3'.
x2 = 36
Simplifying
x2 = 36
Take the square root of each side:
x = {-6, 6}
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