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Simplifying 30 = -7.5(x + -4.2) Reorder the terms: 30 = -7.5(-4.2 + x) 30 = (-4.2 * -7.5 + x * -7.5) 30 = (31.5 + -7.5x) Solving 30 = 31.5 + -7.5x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '7.5x' to each side of the equation. 30 + 7.5x = 31.5 + -7.5x + 7.5x Combine like terms: -7.5x + 7.5x = 0.0 30 + 7.5x = 31.5 + 0.0 30 + 7.5x = 31.5 Add '-30' to each side of the equation. 30 + -30 + 7.5x = 31.5 + -30 Combine like terms: 30 + -30 = 0 0 + 7.5x = 31.5 + -30 7.5x = 31.5 + -30 Combine like terms: 31.5 + -30 = 1.5 7.5x = 1.5 Divide each side by '7.5'. x = 0.2 Simplifying x = 0.2
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