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Simplifying x2 + -7x + -8 = x2 Reorder the terms: -8 + -7x + x2 = x2 Add '-1x2' to each side of the equation. -8 + -7x + x2 + -1x2 = x2 + -1x2 Combine like terms: x2 + -1x2 = 0 -8 + -7x + 0 = x2 + -1x2 -8 + -7x = x2 + -1x2 Combine like terms: x2 + -1x2 = 0 -8 + -7x = 0 Solving -8 + -7x = 0 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '8' to each side of the equation. -8 + 8 + -7x = 0 + 8 Combine like terms: -8 + 8 = 0 0 + -7x = 0 + 8 -7x = 0 + 8 Combine like terms: 0 + 8 = 8 -7x = 8 Divide each side by '-7'. x = -1.142857143 Simplifying x = -1.142857143
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