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Simplifying
2(x2 + -5) = 40
Reorder the terms:
2(-5 + x2) = 40
(-5 * 2 + x2 * 2) = 40
(-10 + 2x2) = 40
Solving
-10 + 2x2 = 40
Solving for variable 'x'.
Move all terms containing x to the left, all other terms to the right.
Add '10' to each side of the equation.
-10 + 10 + 2x2 = 40 + 10
Combine like terms: -10 + 10 = 0
0 + 2x2 = 40 + 10
2x2 = 40 + 10
Combine like terms: 40 + 10 = 50
2x2 = 50
Divide each side by '2'.
x2 = 25
Simplifying
x2 = 25
Take the square root of each side:
x = {-5, 5}
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