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Simplifying (0.3) * x + 4 = (0.8) * x Reorder the terms: 4 + 0.3x = (0.8) * x Solving 4 + 0.3x = 0.8x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.8x' to each side of the equation. 4 + 0.3x + -0.8x = 0.8x + -0.8x Combine like terms: 0.3x + -0.8x = -0.5x 4 + -0.5x = 0.8x + -0.8x Combine like terms: 0.8x + -0.8x = 0.0 4 + -0.5x = 0.0 Add '-4' to each side of the equation. 4 + -4 + -0.5x = 0.0 + -4 Combine like terms: 4 + -4 = 0 0 + -0.5x = 0.0 + -4 -0.5x = 0.0 + -4 Combine like terms: 0.0 + -4 = -4 -0.5x = -4 Divide each side by '-0.5'. x = 8 Simplifying x = 8
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