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Simplifying 42 + 5x = 3x Solving 42 + 5x = 3x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-3x' to each side of the equation. 42 + 5x + -3x = 3x + -3x Combine like terms: 5x + -3x = 2x 42 + 2x = 3x + -3x Combine like terms: 3x + -3x = 0 42 + 2x = 0 Add '-42' to each side of the equation. 42 + -42 + 2x = 0 + -42 Combine like terms: 42 + -42 = 0 0 + 2x = 0 + -42 2x = 0 + -42 Combine like terms: 0 + -42 = -42 2x = -42 Divide each side by '2'. x = -21 Simplifying x = -21
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