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Simplifying 15x + -8x + 7 = -42 Reorder the terms: 7 + 15x + -8x = -42 Combine like terms: 15x + -8x = 7x 7 + 7x = -42 Solving 7 + 7x = -42 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-7' to each side of the equation. 7 + -7 + 7x = -42 + -7 Combine like terms: 7 + -7 = 0 0 + 7x = -42 + -7 7x = -42 + -7 Combine like terms: -42 + -7 = -49 7x = -49 Divide each side by '7'. x = -7 Simplifying x = -7
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