Question

8,9х+17,54=5,4х+2,84 

Answer 1

8,9х+17,54=5,4х+2,84 

8,9х-5,4х=2,84-17,54

3,5х=-14,7

х=-14,7:3,5

х=-4,2

проверка:

8,9*(-4,2)+17,54=5,4*(-4,2)+2,84

-19,84=-19,84

Answer 2

8,9х+17,54=5,4х+2,84 

8,9х-5,4х=2,84-17,54

3,5х=-14,7

х=-14,7:3,5

х=-4,2