Question

упростить:4/9*(2,7у-2 1/4x)-4,2*(5/7у-0,5x)

Answer 1

= 4/9*27/10у-4/9*9/4х-42/10*5/7у+42/10*1/2х= 3/5у-х-6/2у+21/10х= 6/10у-3у-х+2,1х= - 2 4/10у+1,1х=1,1х-2,4у