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Simplifying (7x + 1)(x + 4) = 0 Reorder the terms: (1 + 7x)(x + 4) = 0 Reorder the terms: (1 + 7x)(4 + x) = 0 Multiply (1 + 7x) * (4 + x) (1(4 + x) + 7x * (4 + x)) = 0 ((4 * 1 + x * 1) + 7x * (4 + x)) = 0 ((4 + 1x) + 7x * (4 + x)) = 0 (4 + 1x + (4 * 7x + x * 7x)) = 0 (4 + 1x + (28x + 7x2)) = 0 Combine like terms: 1x + 28x = 29x (4 + 29x + 7x2) = 0 Solving 4 + 29x + 7x2 = 0 Solving for variable 'x'. Factor a trinomial. (4 + x)(1 + 7x) = 0Subproblem 1
Set the factor '(4 + x)' equal to zero and attempt to solve: Simplifying 4 + x = 0 Solving 4 + x = 0 Move all terms containing x to the left, all other terms to the right. Add '-4' to each side of the equation. 4 + -4 + x = 0 + -4 Combine like terms: 4 + -4 = 0 0 + x = 0 + -4 x = 0 + -4 Combine like terms: 0 + -4 = -4 x = -4 Simplifying x = -4Subproblem 2
Set the factor '(1 + 7x)' equal to zero and attempt to solve: Simplifying 1 + 7x = 0 Solving 1 + 7x = 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 + 7x = 0 + -1 Combine like terms: 1 + -1 = 0 0 + 7x = 0 + -1 7x = 0 + -1 Combine like terms: 0 + -1 = -1 7x = -1 Divide each side by '7'. x = -0.1428571429 Simplifying x = -0.1428571429Solution
x = {-4, -0.1428571429}
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