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Simplifying
5x2 + 7 = 77
Reorder the terms:
7 + 5x2 = 77
Solving
7 + 5x2 = 77
Solving for variable 'x'.
Move all terms containing x to the left, all other terms to the right.
Add '-7' to each side of the equation.
7 + -7 + 5x2 = 77 + -7
Combine like terms: 7 + -7 = 0
0 + 5x2 = 77 + -7
5x2 = 77 + -7
Combine like terms: 77 + -7 = 70
5x2 = 70
Divide each side by '5'.
x2 = 14
Simplifying
x2 = 14
Take the square root of each side:
x = {-3.741657387, 3.741657387}
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