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Simplifying 300 + -1(x + y) = 2x 300 + (x * -1 + y * -1) = 2x 300 + (-1x + -1y) = 2x Solving 300 + -1x + -1y = 2x 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. 300 + -1x + -2x + -1y = 2x + -2x Combine like terms: -1x + -2x = -3x 300 + -3x + -1y = 2x + -2x Combine like terms: 2x + -2x = 0 300 + -3x + -1y = 0 Add '-300' to each side of the equation. 300 + -3x + -300 + -1y = 0 + -300 Reorder the terms: 300 + -300 + -3x + -1y = 0 + -300 Combine like terms: 300 + -300 = 0 0 + -3x + -1y = 0 + -300 -3x + -1y = 0 + -300 Combine like terms: 0 + -300 = -300 -3x + -1y = -300 Add 'y' to each side of the equation. -3x + -1y + y = -300 + y Combine like terms: -1y + y = 0 -3x + 0 = -300 + y -3x = -300 + y Divide each side by '-3'. x = 100 + -0.3333333333y Simplifying x = 100 + -0.3333333333y
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