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Simplifying 3.9x + 10 = 1.9x + 20 Reorder the terms: 10 + 3.9x = 1.9x + 20 Reorder the terms: 10 + 3.9x = 20 + 1.9x Solving 10 + 3.9x = 20 + 1.9x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.9x' to each side of the equation. 10 + 3.9x + -1.9x = 20 + 1.9x + -1.9x Combine like terms: 3.9x + -1.9x = 2x 10 + 2x = 20 + 1.9x + -1.9x Combine like terms: 1.9x + -1.9x = 0.0 10 + 2x = 20 + 0.0 10 + 2x = 20 Add '-10' to each side of the equation. 10 + -10 + 2x = 20 + -10 Combine like terms: 10 + -10 = 0 0 + 2x = 20 + -10 2x = 20 + -10 Combine like terms: 20 + -10 = 10 2x = 10 Divide each side by '2'. x = 5 Simplifying x = 5
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