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Simplifying 7.5 = 30 + -5x * 4.5 Reorder the terms for easier multiplication: 7.5 = 30 + -5 * 4.5x Multiply -5 * 4.5 7.5 = 30 + -22.5x Solving 7.5 = 30 + -22.5x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '22.5x' to each side of the equation. 7.5 + 22.5x = 30 + -22.5x + 22.5x Combine like terms: -22.5x + 22.5x = 0.0 7.5 + 22.5x = 30 + 0.0 7.5 + 22.5x = 30 Add '-7.5' to each side of the equation. 7.5 + -7.5 + 22.5x = 30 + -7.5 Combine like terms: 7.5 + -7.5 = 0.0 0.0 + 22.5x = 30 + -7.5 22.5x = 30 + -7.5 Combine like terms: 30 + -7.5 = 22.5 22.5x = 22.5 Divide each side by '22.5'. x = 1 Simplifying x = 1
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