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Simplifying 42 = 2(x + y) 42 = (x * 2 + y * 2) 42 = (2x + 2y) Solving 42 = 2x + 2y 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. 42 + -2x = 2x + -2x + 2y Combine like terms: 2x + -2x = 0 42 + -2x = 0 + 2y 42 + -2x = 2y Add '-42' to each side of the equation. 42 + -42 + -2x = -42 + 2y Combine like terms: 42 + -42 = 0 0 + -2x = -42 + 2y -2x = -42 + 2y Divide each side by '-2'. x = 21 + -1y Simplifying x = 21 + -1y
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