2.9 х-1.1 х=5.04; 0.8 (х-1.9) = 0.56; 2.4 х-1.5 х+47; 7 х+9 х+0.32=2.72; 5 у+7 у-0.024=0.204; 0.11 х+0.08 х=45.6; 0.8 (100-0.04 х) = 8.64; 17 (5 х-0.16) = 0.238

1) 2.9 х-1.1 х=5.04

1.8 х=5.04

х=2.8

2) 0.8 (х-1.9) = 0.56

0.8 х-1.52=0.56

0.8 х=2.08

х=2.6

3) 7 х+9 х+0.32=2.72

16 х+0.32=2.72

16 х=2.4

х=0.15

4) 5 у+7 у-0.024=0.204

12 у=0.228

у=0.019

5) 0.11 х+0.08 х=45.6

0.19 х=45.6

х=240

6) 0.8 (100-0.04 х) = 8.64

80-0.032 х=8.64

-0.032 х=-71.36

х=2230

7) 17 (5 х-0.16) = 0.238

85 х-2.72=0.238

85 х=2.958

х=0.0348

2.9 х-1.1 х=5.04

1,8x=5,04

x=2,8

0.8 (х-1.9) = 0.56

0,8x-1,52=0,56

x=2,6

2.4 х-1.5 х+47=0

0,9x=-47

x=-52,2

7 х+9 х+0.32=2.72

16x=2,4

x=0,15

5 у+7 у-0.024=0.204

12y=0.228

y=0,019

0.11 х+0.08 х=45.6

0,19x=45,6

x=240

0.8 (100-0.04 х) = 8.64

80-0,032x=8,64

-0,032x=-71,36

x=2230

17 (5 х-0.16) = 0.238

85x-2,72=0,238

85x=2,958

x=0,0348