4х+6х-х=21,6 7у-у+3у=61,2
1) 4X + 6X - X = 21.6 9X = 21.6 X = 2.4 2) 7Y - Y + 3Y = 61.2 9Y = 61.2 Y = 6.8
4х+6х-х=21.6 9х=21,6 х=2,4 7у-у+3у=61,2 9у=61,2 у=6,8