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Simplifying
3x2 + 31 = 79
Reorder the terms:
31 + 3x2 = 79
Solving
31 + 3x2 = 79
Solving for variable 'x'.
Move all terms containing x to the left, all other terms to the right.
Add '-31' to each side of the equation.
31 + -31 + 3x2 = 79 + -31
Combine like terms: 31 + -31 = 0
0 + 3x2 = 79 + -31
3x2 = 79 + -31
Combine like terms: 79 + -31 = 48
3x2 = 48
Divide each side by '3'.
x2 = 16
Simplifying
x2 = 16
Take the square root of each side:
x = {-4, 4}
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