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Simplifying
2(x2 + 7) = 40
Reorder the terms:
2(7 + x2) = 40
(7 * 2 + x2 * 2) = 40
(14 + 2x2) = 40
Solving
14 + 2x2 = 40
Solving for variable 'x'.
Move all terms containing x to the left, all other terms to the right.
Add '-14' to each side of the equation.
14 + -14 + 2x2 = 40 + -14
Combine like terms: 14 + -14 = 0
0 + 2x2 = 40 + -14
2x2 = 40 + -14
Combine like terms: 40 + -14 = 26
2x2 = 26
Divide each side by '2'.
x2 = 13
Simplifying
x2 = 13
Take the square root of each side:
x = {-3.605551275, 3.605551275}
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