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Simplifying 5x + 2(x + 1) = 142 Reorder the terms: 5x + 2(1 + x) = 142 5x + (1 * 2 + x * 2) = 142 5x + (2 + 2x) = 142 Reorder the terms: 2 + 5x + 2x = 142 Combine like terms: 5x + 2x = 7x 2 + 7x = 142 Solving 2 + 7x = 142 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2' to each side of the equation. 2 + -2 + 7x = 142 + -2 Combine like terms: 2 + -2 = 0 0 + 7x = 142 + -2 7x = 142 + -2 Combine like terms: 142 + -2 = 140 7x = 140 Divide each side by '7'. x = 20 Simplifying x = 20
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