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Simplifying
5x2 + 20 = 425
Reorder the terms:
20 + 5x2 = 425
Solving
20 + 5x2 = 425
Solving for variable 'x'.
Move all terms containing x to the left, all other terms to the right.
Add '-20' to each side of the equation.
20 + -20 + 5x2 = 425 + -20
Combine like terms: 20 + -20 = 0
0 + 5x2 = 425 + -20
5x2 = 425 + -20
Combine like terms: 425 + -20 = 405
5x2 = 405
Divide each side by '5'.
x2 = 81
Simplifying
x2 = 81
Take the square root of each side:
x = {-9, 9}
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