а) 8.9 х +17.54=5.4х+2.84
Б) 4/15у +2.8=6.3-3/20

а) 8.9 х +17.54=5.4х+2.848.9x-5.4x=2.84-17.543.5x=-14.7x=-14.7:3.5x=-4.2Б) 4/15у +2.8=6.3-3/204/15y=63/10-3/20-28/104/15y=126/20-3/20-56/204/15y=67/20y=67/20:4/15y=67/20*15/4=67/4*3/4y=201/16=12 9/16

а)8.9х-5.4х=2.84-17.543.5х=-14,7х=-14,7:3.5х=-4.2б)4:15у+2.8=6.3-3:2015у=6.3-0.15-4-2.815у=2.3-0.15-2.815у=-0.5-0.1515у=-0.65у=-0.65:15у=-0.04