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Simplifying
80 = 5x2 + 20
Reorder the terms:
80 = 20 + 5x2
Solving
80 = 20 + 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.
80 + -5x2 = 20 + 5x2 + -5x2
Combine like terms: 5x2 + -5x2 = 0
80 + -5x2 = 20 + 0
80 + -5x2 = 20
Add '-80' to each side of the equation.
80 + -80 + -5x2 = 20 + -80
Combine like terms: 80 + -80 = 0
0 + -5x2 = 20 + -80
-5x2 = 20 + -80
Combine like terms: 20 + -80 = -60
-5x2 = -60
Divide each side by '-5'.
x2 = 12
Simplifying
x2 = 12
Take the square root of each side:
x = {-3.464101615, 3.464101615}
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