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Simplifying
5x2 + 8 = 413
Reorder the terms:
8 + 5x2 = 413
Solving
8 + 5x2 = 413
Solving for variable 'x'.
Move all terms containing x to the left, all other terms to the right.
Add '-8' to each side of the equation.
8 + -8 + 5x2 = 413 + -8
Combine like terms: 8 + -8 = 0
0 + 5x2 = 413 + -8
5x2 = 413 + -8
Combine like terms: 413 + -8 = 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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