А)26(x+427)=15756

26x+11102=15756

26x=15756-11102

26x=4654

x=4654/26

x=179

б)6768:(y-39)=564

6768=564(y-39)

6768=564y-21996

564y-21996=6768

564y=6768+21996

564y=28764

y=28764/564

y=51