9b+6b-15=615 ,17x-x+5x-19=170,52+72:x=56,56:x-6=8

Question

9b+6b-15=615 ,17x-x+5x-19=170,52+72:x=56,56:x-6=8

Answer 1

15b - 15 = 615

15b = 630

b = 630/15

b = 42/

Ответ: b = 42.

 

5х - 2 = 170

5х = 170 + 2

5х = 172

х = 172/5 = 34,4.

Ответ: х = 34,4.

 

72/х = 56 - 52

72/х = 4

х = 72/4

х = 18.

Ответ: х = 18.

 

56/х = 14

х = 56/14

х = 4.

Ответ: х = 4.