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Simplifying 0.3n + x = 0.8(n + x) 0.3n + x = (n * 0.8 + x * 0.8) 0.3n + x = (0.8n + 0.8x) Solving 0.3n + x = 0.8n + 0.8x Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '-0.8n' to each side of the equation. 0.3n + -0.8n + x = 0.8n + -0.8n + 0.8x Combine like terms: 0.3n + -0.8n = -0.5n -0.5n + x = 0.8n + -0.8n + 0.8x Combine like terms: 0.8n + -0.8n = 0.0 -0.5n + x = 0.0 + 0.8x -0.5n + x = 0.8x Add '-1x' to each side of the equation. -0.5n + x + -1x = 0.8x + -1x Combine like terms: x + -1x = 0 -0.5n + 0 = 0.8x + -1x -0.5n = 0.8x + -1x Combine like terms: 0.8x + -1x = -0.2x -0.5n = -0.2x Divide each side by '-0.5'. n = 0.4x Simplifying n = 0.4x
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