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Simplifying 55 = 2(x + 7) + 1 Reorder the terms: 55 = 2(7 + x) + 1 55 = (7 * 2 + x * 2) + 1 55 = (14 + 2x) + 1 Reorder the terms: 55 = 14 + 1 + 2x Combine like terms: 14 + 1 = 15 55 = 15 + 2x Solving 55 = 15 + 2x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2x' to each side of the equation. 55 + -2x = 15 + 2x + -2x Combine like terms: 2x + -2x = 0 55 + -2x = 15 + 0 55 + -2x = 15 Add '-55' to each side of the equation. 55 + -55 + -2x = 15 + -55 Combine like terms: 55 + -55 = 0 0 + -2x = 15 + -55 -2x = 15 + -55 Combine like terms: 15 + -55 = -40 -2x = -40 Divide each side by '-2'. x = 20 Simplifying x = 20
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