5/6(4,2х-1 1/5у)-5,4(2/9х-1,5у)Упростить

Question

5/6(4,2х-1 1/5у)-5,4(2/9х-1,5у)Упростить

Answer 1

Пишу со второй строки:

5/6х*42/10-5/6*6/5у-54/10*2/9х+5,4*1,5у=7/2х-у-6/5х+8,1у=35/10х-12/10х+7,1у=23/10х+7,1у=2,3х+7,1у