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Simplifying 8x(x + 7) = x + -42 Reorder the terms: 8x(7 + x) = x + -42 (7 * 8x + x * 8x) = x + -42 (56x + 8x2) = x + -42 Reorder the terms: 56x + 8x2 = -42 + x Solving 56x + 8x2 = -42 + x Solving for variable 'x'. Reorder the terms: 42 + 56x + -1x + 8x2 = -42 + x + 42 + -1x Combine like terms: 56x + -1x = 55x 42 + 55x + 8x2 = -42 + x + 42 + -1x Reorder the terms: 42 + 55x + 8x2 = -42 + 42 + x + -1x Combine like terms: -42 + 42 = 0 42 + 55x + 8x2 = 0 + x + -1x 42 + 55x + 8x2 = x + -1x Combine like terms: x + -1x = 0 42 + 55x + 8x2 = 0 Factor a trinomial. (6 + x)(7 + 8x) = 0Subproblem 1
Set the factor '(6 + x)' equal to zero and attempt to solve: Simplifying 6 + x = 0 Solving 6 + x = 0 Move all terms containing x to the left, all other terms to the right. Add '-6' to each side of the equation. 6 + -6 + x = 0 + -6 Combine like terms: 6 + -6 = 0 0 + x = 0 + -6 x = 0 + -6 Combine like terms: 0 + -6 = -6 x = -6 Simplifying x = -6Subproblem 2
Set the factor '(7 + 8x)' equal to zero and attempt to solve: Simplifying 7 + 8x = 0 Solving 7 + 8x = 0 Move all terms containing x to the left, all other terms to the right. Add '-7' to each side of the equation. 7 + -7 + 8x = 0 + -7 Combine like terms: 7 + -7 = 0 0 + 8x = 0 + -7 8x = 0 + -7 Combine like terms: 0 + -7 = -7 8x = -7 Divide each side by '8'. x = -0.875 Simplifying x = -0.875Solution
x = {-6, -0.875}
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