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Simplifying
5(x2 + -3) = 72
Reorder the terms:
5(-3 + x2) = 72
(-3 * 5 + x2 * 5) = 72
(-15 + 5x2) = 72
Solving
-15 + 5x2 = 72
Solving for variable 'x'.
Move all terms containing x to the left, all other terms to the right.
Add '15' to each side of the equation.
-15 + 15 + 5x2 = 72 + 15
Combine like terms: -15 + 15 = 0
0 + 5x2 = 72 + 15
5x2 = 72 + 15
Combine like terms: 72 + 15 = 87
5x2 = 87
Divide each side by '5'.
x2 = 17.4
Simplifying
x2 = 17.4
Take the square root of each side:
x = {-4.171330723, 4.171330723}
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