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Simplifying 7 + 0.30x = 0.20(7 + x) 7 + 0.30x = (7 * 0.20 + x * 0.20) 7 + 0.30x = (1.4 + 0.20x) Solving 7 + 0.30x = 1.4 + 0.20x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.20x' to each side of the equation. 7 + 0.30x + -0.20x = 1.4 + 0.20x + -0.20x Combine like terms: 0.30x + -0.20x = 0.1x 7 + 0.1x = 1.4 + 0.20x + -0.20x Combine like terms: 0.20x + -0.20x = 0.00 7 + 0.1x = 1.4 + 0.00 7 + 0.1x = 1.4 Add '-7' to each side of the equation. 7 + -7 + 0.1x = 1.4 + -7 Combine like terms: 7 + -7 = 0 0 + 0.1x = 1.4 + -7 0.1x = 1.4 + -7 Combine like terms: 1.4 + -7 = -5.6 0.1x = -5.6 Divide each side by '0.1'. x = -56 Simplifying x = -56
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