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Simplifying
15 = 5x2 + 3
Reorder the terms:
15 = 3 + 5x2
Solving
15 = 3 + 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.
15 + -5x2 = 3 + 5x2 + -5x2
Combine like terms: 5x2 + -5x2 = 0
15 + -5x2 = 3 + 0
15 + -5x2 = 3
Add '-15' to each side of the equation.
15 + -15 + -5x2 = 3 + -15
Combine like terms: 15 + -15 = 0
0 + -5x2 = 3 + -15
-5x2 = 3 + -15
Combine like terms: 3 + -15 = -12
-5x2 = -12
Divide each side by '-5'.
x2 = 2.4
Simplifying
x2 = 2.4
Take the square root of each side:
x = {-1.549193338, 1.549193338}
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