Question

-3 (0,2x +0,4у)+2 (1,6x+2,8y)
упростите
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Answer 1

$-3 (0,2x +0,4y)+2 (1,6x+2,8y) = - 0.6x - 1.2y + 3.2x + 5.6y = 2.6x + 4.4y = 2(1.3x + 2.2y)$