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Simplifying 0.4(x + 30) + 0.4X = 28 Reorder the terms: 0.4(30 + x) + 0.4X = 28 (30 * 0.4 + x * 0.4) + 0.4X = 28 (12 + 0.4x) + 0.4X = 28 Reorder the terms: 12 + 0.4X + 0.4x = 28 Solving 12 + 0.4X + 0.4x = 28 Solving for variable 'X'. Move all terms containing X to the left, all other terms to the right. Add '-12' to each side of the equation. 12 + 0.4X + -12 + 0.4x = 28 + -12 Reorder the terms: 12 + -12 + 0.4X + 0.4x = 28 + -12 Combine like terms: 12 + -12 = 0 0 + 0.4X + 0.4x = 28 + -12 0.4X + 0.4x = 28 + -12 Combine like terms: 28 + -12 = 16 0.4X + 0.4x = 16 Add '-0.4x' to each side of the equation. 0.4X + 0.4x + -0.4x = 16 + -0.4x Combine like terms: 0.4x + -0.4x = 0.0 0.4X + 0.0 = 16 + -0.4x 0.4X = 16 + -0.4x Divide each side by '0.4'. X = 40 + -1x Simplifying X = 40 + -1x
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