Упростите выражение:
5/6 (4.2х - 1 1/5у) - 5.4 (2/9х - 1,5у)
Срочно! Спасибо)
5/6 (4.2х - 1 1/5у) - 5.4 (2/9х - 1,5у)
Срочно! Спасибо)
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= (4,2 * 5 : 6)х - (5/6 * 6/5)у - (5,4 * 2 : 9)х + 8,1у == 3,5х - у - 1,2х + 8,1у = (3,5х - 1,2х) + (8,1у - у) =
= 2,3х + 7,1у.