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Simplifying 3x + y = 4(2 + -1x) 3x + y = (2 * 4 + -1x * 4) 3x + y = (8 + -4x) Solving 3x + y = 8 + -4x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '4x' to each side of the equation. 3x + 4x + y = 8 + -4x + 4x Combine like terms: 3x + 4x = 7x 7x + y = 8 + -4x + 4x Combine like terms: -4x + 4x = 0 7x + y = 8 + 0 7x + y = 8 Add '-1y' to each side of the equation. 7x + y + -1y = 8 + -1y Combine like terms: y + -1y = 0 7x + 0 = 8 + -1y 7x = 8 + -1y Divide each side by '7'. x = 1.142857143 + -0.1428571429y Simplifying x = 1.142857143 + -0.1428571429y
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