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Simplifying 2(40 + x) = 42x (40 * 2 + x * 2) = 42x (80 + 2x) = 42x Solving 80 + 2x = 42x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-42x' to each side of the equation. 80 + 2x + -42x = 42x + -42x Combine like terms: 2x + -42x = -40x 80 + -40x = 42x + -42x Combine like terms: 42x + -42x = 0 80 + -40x = 0 Add '-80' to each side of the equation. 80 + -80 + -40x = 0 + -80 Combine like terms: 80 + -80 = 0 0 + -40x = 0 + -80 -40x = 0 + -80 Combine like terms: 0 + -80 = -80 -40x = -80 Divide each side by '-40'. x = 2 Simplifying x = 2
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