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Simplifying x2 + 7 = x2 + -8x Reorder the terms: 7 + x2 = x2 + -8x Reorder the terms: 7 + x2 = -8x + x2 Add '-1x2' to each side of the equation. 7 + x2 + -1x2 = -8x + x2 + -1x2 Combine like terms: x2 + -1x2 = 0 7 + 0 = -8x + x2 + -1x2 7 = -8x + x2 + -1x2 Combine like terms: x2 + -1x2 = 0 7 = -8x + 0 7 = -8x Solving 7 = -8x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '8x' to each side of the equation. 7 + 8x = -8x + 8x Combine like terms: -8x + 8x = 0 7 + 8x = 0 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 = -0.875
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