Помогите пж ................

$- 8.5( - 1.1x + 4x - y) - 25(x + y - 10) - (x - y - 2) + ( - 8x - y) = \\ \\ = 93.5x - 34x + 8.5y - 25x - 25y + 250 - x + y + 2 - 8x - y = \\ \\ = (93.5x - 34x - 25x - x - 8x) + (8.5y - 25y + y - y) + 250 + 2 = \\ \\ = 25.5x - 16.5y + 252$
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$- 100( - 8x + y - 2x) - 4( - x + 5.1y) - ( - 8.1 + 5x - y) - 2x + 5y = \\ \\ = 800x - 100y + 200x + 4x - 20.4y + 8.1 - 5x + y - 2x + 5y = \\ \\ = (800x + 200x + 4x - 5x - 2x) + ( - 100y - 20.4y + y + 5y) + 8.1 = \\ \\ = 997x - 114.4y + 8.1$

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