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Simplifying (x + 9)(8x + 7) = 0 Reorder the terms: (9 + x)(8x + 7) = 0 Reorder the terms: (9 + x)(7 + 8x) = 0 Multiply (9 + x) * (7 + 8x) (9(7 + 8x) + x(7 + 8x)) = 0 ((7 * 9 + 8x * 9) + x(7 + 8x)) = 0 ((63 + 72x) + x(7 + 8x)) = 0 (63 + 72x + (7 * x + 8x * x)) = 0 (63 + 72x + (7x + 8x2)) = 0 Combine like terms: 72x + 7x = 79x (63 + 79x + 8x2) = 0 Solving 63 + 79x + 8x2 = 0 Solving for variable 'x'. Factor a trinomial. (9 + x)(7 + 8x) = 0Subproblem 1
Set the factor '(9 + x)' equal to zero and attempt to solve: Simplifying 9 + x = 0 Solving 9 + x = 0 Move all terms containing x to the left, all other terms to the right. Add '-9' to each side of the equation. 9 + -9 + x = 0 + -9 Combine like terms: 9 + -9 = 0 0 + x = 0 + -9 x = 0 + -9 Combine like terms: 0 + -9 = -9 x = -9 Simplifying x = -9Subproblem 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 = {-9, -0.875}
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