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Simplifying
7x2 + 3 = 115
Reorder the terms:
3 + 7x2 = 115
Solving
3 + 7x2 = 115
Solving for variable 'x'.
Move all terms containing x to the left, all other terms to the right.
Add '-3' to each side of the equation.
3 + -3 + 7x2 = 115 + -3
Combine like terms: 3 + -3 = 0
0 + 7x2 = 115 + -3
7x2 = 115 + -3
Combine like terms: 115 + -3 = 112
7x2 = 112
Divide each side by '7'.
x2 = 16
Simplifying
x2 = 16
Take the square root of each side:
x = {-4, 4}
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