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Simplifying x2 + 8x + 7 = x + 7 Reorder the terms: 7 + 8x + x2 = x + 7 Reorder the terms: 7 + 8x + x2 = 7 + x Add '-7' to each side of the equation. 7 + 8x + -7 + x2 = 7 + -7 + x Reorder the terms: 7 + -7 + 8x + x2 = 7 + -7 + x Combine like terms: 7 + -7 = 0 0 + 8x + x2 = 7 + -7 + x 8x + x2 = 7 + -7 + x Combine like terms: 7 + -7 = 0 8x + x2 = 0 + x 8x + x2 = x Solving 8x + x2 = x Solving for variable 'x'. Reorder the terms: 8x + -1x + x2 = x + -1x Combine like terms: 8x + -1x = 7x 7x + x2 = x + -1x Combine like terms: x + -1x = 0 7x + x2 = 0 Factor out the Greatest Common Factor (GCF), 'x'. x(7 + x) = 0Subproblem 1
Set the factor 'x' equal to zero and attempt to solve: Simplifying x = 0 Solving x = 0 Move all terms containing x to the left, all other terms to the right. Simplifying x = 0Subproblem 2
Set the factor '(7 + x)' equal to zero and attempt to solve: Simplifying 7 + x = 0 Solving 7 + x = 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 + x = 0 + -7 Combine like terms: 7 + -7 = 0 0 + x = 0 + -7 x = 0 + -7 Combine like terms: 0 + -7 = -7 x = -7 Simplifying x = -7Solution
x = {0, -7}
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