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Simplifying 0.2(4) * x = 0.4(4 + x) Multiply 0.2 * 4 0.8x = 0.4(4 + x) 0.8x = (4 * 0.4 + x * 0.4) 0.8x = (1.6 + 0.4x) Solving 0.8x = 1.6 + 0.4x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.4x' to each side of the equation. 0.8x + -0.4x = 1.6 + 0.4x + -0.4x Combine like terms: 0.8x + -0.4x = 0.4x 0.4x = 1.6 + 0.4x + -0.4x Combine like terms: 0.4x + -0.4x = 0.0 0.4x = 1.6 + 0.0 0.4x = 1.6 Divide each side by '0.4'. x = 4 Simplifying x = 4
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