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Simplifying
480 = 30 + 15x2 + 60
Reorder the terms:
480 = 30 + 60 + 15x2
Combine like terms: 30 + 60 = 90
480 = 90 + 15x2
Solving
480 = 90 + 15x2
Solving for variable 'x'.
Move all terms containing x to the left, all other terms to the right.
Add '-15x2' to each side of the equation.
480 + -15x2 = 90 + 15x2 + -15x2
Combine like terms: 15x2 + -15x2 = 0
480 + -15x2 = 90 + 0
480 + -15x2 = 90
Add '-480' to each side of the equation.
480 + -480 + -15x2 = 90 + -480
Combine like terms: 480 + -480 = 0
0 + -15x2 = 90 + -480
-15x2 = 90 + -480
Combine like terms: 90 + -480 = -390
-15x2 = -390
Divide each side by '-15'.
x2 = 26
Simplifying
x2 = 26
Take the square root of each side:
x = {-5.099019514, 5.099019514}
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