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Simplifying 7x + -9 = x + -15 Reorder the terms: -9 + 7x = x + -15 Reorder the terms: -9 + 7x = -15 + x Solving -9 + 7x = -15 + x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1x' to each side of the equation. -9 + 7x + -1x = -15 + x + -1x Combine like terms: 7x + -1x = 6x -9 + 6x = -15 + x + -1x Combine like terms: x + -1x = 0 -9 + 6x = -15 + 0 -9 + 6x = -15 Add '9' to each side of the equation. -9 + 9 + 6x = -15 + 9 Combine like terms: -9 + 9 = 0 0 + 6x = -15 + 9 6x = -15 + 9 Combine like terms: -15 + 9 = -6 6x = -6 Divide each side by '6'. x = -1 Simplifying x = -1
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