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Simplifying
5x2 + -120 = -40
Reorder the terms:
-120 + 5x2 = -40
Solving
-120 + 5x2 = -40
Solving for variable 'x'.
Move all terms containing x to the left, all other terms to the right.
Add '120' to each side of the equation.
-120 + 120 + 5x2 = -40 + 120
Combine like terms: -120 + 120 = 0
0 + 5x2 = -40 + 120
5x2 = -40 + 120
Combine like terms: -40 + 120 = 80
5x2 = 80
Divide each side by '5'.
x2 = 16
Simplifying
x2 = 16
Take the square root of each side:
x = {-4, 4}
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