Question

Решите уравнение:

1) 7 (x-19)=133;

2) 9 (213-2x)=927;

3)1344:(x+26)=32;

4)384:(51-5x)=24;

Answer 1

7(х-19)=133

7х-133=133

7х=133+133

7х=266

х=266/7

х=38

9(213-2х)=927

1917-18х=927

18х=1917-927

18х=990

х=990/18

х=55

1344:(х+26)=32

х+26=1344/32

х+26=42

х=16

384:(51-5x)=24;

51-5х=384:24

51-5х=16

5х=51-16

5х=35

х=7