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Simplifying
5x2 + 405 = 1125
Reorder the terms:
405 + 5x2 = 1125
Solving
405 + 5x2 = 1125
Solving for variable 'x'.
Move all terms containing x to the left, all other terms to the right.
Add '-405' to each side of the equation.
405 + -405 + 5x2 = 1125 + -405
Combine like terms: 405 + -405 = 0
0 + 5x2 = 1125 + -405
5x2 = 1125 + -405
Combine like terms: 1125 + -405 = 720
5x2 = 720
Divide each side by '5'.
x2 = 144
Simplifying
x2 = 144
Take the square root of each side:
x = {-12, 12}
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