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Simplifying 7x + x + 3 = 42 + 5x Reorder the terms: 3 + 7x + x = 42 + 5x Combine like terms: 7x + x = 8x 3 + 8x = 42 + 5x Solving 3 + 8x = 42 + 5x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-5x' to each side of the equation. 3 + 8x + -5x = 42 + 5x + -5x Combine like terms: 8x + -5x = 3x 3 + 3x = 42 + 5x + -5x Combine like terms: 5x + -5x = 0 3 + 3x = 42 + 0 3 + 3x = 42 Add '-3' to each side of the equation. 3 + -3 + 3x = 42 + -3 Combine like terms: 3 + -3 = 0 0 + 3x = 42 + -3 3x = 42 + -3 Combine like terms: 42 + -3 = 39 3x = 39 Divide each side by '3'. x = 13 Simplifying x = 13
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