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Simplifying
2(x2 + -5) = 8
Reorder the terms:
2(-5 + x2) = 8
(-5 * 2 + x2 * 2) = 8
(-10 + 2x2) = 8
Solving
-10 + 2x2 = 8
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 = 8 + 10
Combine like terms: -10 + 10 = 0
0 + 2x2 = 8 + 10
2x2 = 8 + 10
Combine like terms: 8 + 10 = 18
2x2 = 18
Divide each side by '2'.
x2 = 9
Simplifying
x2 = 9
Take the square root of each side:
x = {-3, 3}
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