1) 0,4х+1,1х+0,3х=20,88 и 2) х+4.09х+0,4х=0,6039

1) 0,4х+1,1х+0,3х=20,88

1,8х=20,88

х=20,88:1,8

х=11,6

2) х+4.09х+0,4х=0,6039

5,49х=0,6039

х=0,6039:5,49

х=0,11

1) 0,4х+1,1х+0,3х=20,88

1.8х=20.88

x= 20.88/1.8

x=11.6

 2) х+4.09х+0,4х=0,6039

5.49x=0,6039

x=0,6039/5.49

x=0.11