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Simplifying
220 = 5x2 + -25
Reorder the terms:
220 = -25 + 5x2
Solving
220 = -25 + 5x2
Solving for variable 'x'.
Move all terms containing x to the left, all other terms to the right.
Add '-5x2' to each side of the equation.
220 + -5x2 = -25 + 5x2 + -5x2
Combine like terms: 5x2 + -5x2 = 0
220 + -5x2 = -25 + 0
220 + -5x2 = -25
Add '-220' to each side of the equation.
220 + -220 + -5x2 = -25 + -220
Combine like terms: 220 + -220 = 0
0 + -5x2 = -25 + -220
-5x2 = -25 + -220
Combine like terms: -25 + -220 = -245
-5x2 = -245
Divide each side by '-5'.
x2 = 49
Simplifying
x2 = 49
Take the square root of each side:
x = {-7, 7}
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