(720+e)*501=365730 5t+30-2t=42 36*(x-3)=10-2*(x+2)

360720+501е=365730

501е=365730-360720

501е=5010

е=5010/501

е=10

5t+30-2t=42

3т+30=42

3т=42-30

3т=12

т=12/3

т=4

36*(x-3)=10-2*(x+2)

36х-108=10-2х+4

36х+2х=108+10-4

38х=114

х=114/38

х=3

720+е=365730/501

720+е=730

е=730-720

е=10

5t-2t+30=42

3t+30=42

3t=42-30

3t=12

t=12/3

t=4

 ну и третье не успеваю

36*(x-3)=10-2*(x+2)

36х-108=10-2х+4

36х+2х=108+10-4

38х=114

х=114/38

х=3