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Simplifying 5(x + 4) = 7x(2x + -4) Reorder the terms: 5(4 + x) = 7x(2x + -4) (4 * 5 + x * 5) = 7x(2x + -4) (20 + 5x) = 7x(2x + -4) Reorder the terms: 20 + 5x = 7x(-4 + 2x) 20 + 5x = (-4 * 7x + 2x * 7x) 20 + 5x = (-28x + 14x2) Solving 20 + 5x = -28x + 14x2 Solving for variable 'x'. Combine like terms: 5x + 28x = 33x 20 + 33x + -14x2 = -28x + 14x2 + 28x + -14x2 Reorder the terms: 20 + 33x + -14x2 = -28x + 28x + 14x2 + -14x2 Combine like terms: -28x + 28x = 0 20 + 33x + -14x2 = 0 + 14x2 + -14x2 20 + 33x + -14x2 = 14x2 + -14x2 Combine like terms: 14x2 + -14x2 = 0 20 + 33x + -14x2 = 0 Factor a trinomial. (20 + -7x)(1 + 2x) = 0Subproblem 1
Set the factor '(20 + -7x)' equal to zero and attempt to solve: Simplifying 20 + -7x = 0 Solving 20 + -7x = 0 Move all terms containing x to the left, all other terms to the right. Add '-20' to each side of the equation. 20 + -20 + -7x = 0 + -20 Combine like terms: 20 + -20 = 0 0 + -7x = 0 + -20 -7x = 0 + -20 Combine like terms: 0 + -20 = -20 -7x = -20 Divide each side by '-7'. x = 2.857142857 Simplifying x = 2.857142857Subproblem 2
Set the factor '(1 + 2x)' equal to zero and attempt to solve: Simplifying 1 + 2x = 0 Solving 1 + 2x = 0 Move all terms containing x to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + 2x = 0 + -1 Combine like terms: 1 + -1 = 0 0 + 2x = 0 + -1 2x = 0 + -1 Combine like terms: 0 + -1 = -1 2x = -1 Divide each side by '2'. x = -0.5 Simplifying x = -0.5Solution
x = {2.857142857, -0.5}
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