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Simplifying 20 + -1(4x + 2y) = 0 20 + (4x * -1 + 2y * -1) = 0 20 + (-4x + -2y) = 0 Solving 20 + -4x + -2y = 0 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-20' to each side of the equation. 20 + -4x + -20 + -2y = 0 + -20 Reorder the terms: 20 + -20 + -4x + -2y = 0 + -20 Combine like terms: 20 + -20 = 0 0 + -4x + -2y = 0 + -20 -4x + -2y = 0 + -20 Combine like terms: 0 + -20 = -20 -4x + -2y = -20 Add '2y' to each side of the equation. -4x + -2y + 2y = -20 + 2y Combine like terms: -2y + 2y = 0 -4x + 0 = -20 + 2y -4x = -20 + 2y Divide each side by '-4'. x = 5 + -0.5y Simplifying x = 5 + -0.5y
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