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Simplifying x2 + -1x + 8 = x2 + 2x + -7 Reorder the terms: 8 + -1x + x2 = x2 + 2x + -7 Reorder the terms: 8 + -1x + x2 = -7 + 2x + x2 Add '-1x2' to each side of the equation. 8 + -1x + x2 + -1x2 = -7 + 2x + x2 + -1x2 Combine like terms: x2 + -1x2 = 0 8 + -1x + 0 = -7 + 2x + x2 + -1x2 8 + -1x = -7 + 2x + x2 + -1x2 Combine like terms: x2 + -1x2 = 0 8 + -1x = -7 + 2x + 0 8 + -1x = -7 + 2x Solving 8 + -1x = -7 + 2x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2x' to each side of the equation. 8 + -1x + -2x = -7 + 2x + -2x Combine like terms: -1x + -2x = -3x 8 + -3x = -7 + 2x + -2x Combine like terms: 2x + -2x = 0 8 + -3x = -7 + 0 8 + -3x = -7 Add '-8' to each side of the equation. 8 + -8 + -3x = -7 + -8 Combine like terms: 8 + -8 = 0 0 + -3x = -7 + -8 -3x = -7 + -8 Combine like terms: -7 + -8 = -15 -3x = -15 Divide each side by '-3'. x = 5 Simplifying x = 5
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