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Simplifying 3x + y + 4x + -2y + 20 = 180 Reorder the terms: 20 + 3x + 4x + y + -2y = 180 Combine like terms: 3x + 4x = 7x 20 + 7x + y + -2y = 180 Combine like terms: y + -2y = -1y 20 + 7x + -1y = 180 Solving 20 + 7x + -1y = 180 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 + 7x + -20 + -1y = 180 + -20 Reorder the terms: 20 + -20 + 7x + -1y = 180 + -20 Combine like terms: 20 + -20 = 0 0 + 7x + -1y = 180 + -20 7x + -1y = 180 + -20 Combine like terms: 180 + -20 = 160 7x + -1y = 160 Add 'y' to each side of the equation. 7x + -1y + y = 160 + y Combine like terms: -1y + y = 0 7x + 0 = 160 + y 7x = 160 + y Divide each side by '7'. x = 22.85714286 + 0.1428571429y Simplifying x = 22.85714286 + 0.1428571429y
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