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Simplifying 7x + 8x + 30 = -45 Reorder the terms: 30 + 7x + 8x = -45 Combine like terms: 7x + 8x = 15x 30 + 15x = -45 Solving 30 + 15x = -45 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-30' to each side of the equation. 30 + -30 + 15x = -45 + -30 Combine like terms: 30 + -30 = 0 0 + 15x = -45 + -30 15x = -45 + -30 Combine like terms: -45 + -30 = -75 15x = -75 Divide each side by '15'. x = -5 Simplifying x = -5
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