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Simplifying
5x2 + 25 = 90
Reorder the terms:
25 + 5x2 = 90
Solving
25 + 5x2 = 90
Solving for variable 'x'.
Move all terms containing x to the left, all other terms to the right.
Add '-25' to each side of the equation.
25 + -25 + 5x2 = 90 + -25
Combine like terms: 25 + -25 = 0
0 + 5x2 = 90 + -25
5x2 = 90 + -25
Combine like terms: 90 + -25 = 65
5x2 = 65
Divide each side by '5'.
x2 = 13
Simplifying
x2 = 13
Take the square root of each side:
x = {-3.605551275, 3.605551275}
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