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Simplifying
-5(x2 + -4) + 7 = 2 + 9
Reorder the terms:
-5(-4 + x2) + 7 = 2 + 9
(-4 * -5 + x2 * -5) + 7 = 2 + 9
(20 + -5x2) + 7 = 2 + 9
Reorder the terms:
20 + 7 + -5x2 = 2 + 9
Combine like terms: 20 + 7 = 27
27 + -5x2 = 2 + 9
Combine like terms: 2 + 9 = 11
27 + -5x2 = 11
Solving
27 + -5x2 = 11
Solving for variable 'x'.
Move all terms containing x to the left, all other terms to the right.
Add '-27' to each side of the equation.
27 + -27 + -5x2 = 11 + -27
Combine like terms: 27 + -27 = 0
0 + -5x2 = 11 + -27
-5x2 = 11 + -27
Combine like terms: 11 + -27 = -16
-5x2 = -16
Divide each side by '-5'.
x2 = 3.2
Simplifying
x2 = 3.2
Take the square root of each side:
x = {-1.788854382, 1.788854382}
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