57,62-4,3у-20,05=75,05+6,7у
-4,3у-6,7у=75,05-57,62+20,05
-11у=37,48
у=-3,407
51,84-3,2х-50,08=-8,12-5,1х
-3,2х+5,1х=-51,84+50,08-8,12
1,9х=-9,88
х=-5,2
1) (13,4-у)*4,3-20,05=75,05+6,7у
37.57-4.3y-75.05-6.7y=0
-37.48-11y=0
y=-37.48/11
y=-937/275
y=-3.407
2) (16,2-х)*3,2-50,08=-8,12-5,1х
51.84-3.2x-50.08+8.12+5.1x=0
1.76-3.2x+8.12+5.1x=0
9.88-3.2x+5.1x=0
9.88+1.9x=0
x=-9.88/1.9x
=-5.2
