Question

Rozwiąż równania:

4/5 razy b = 12/5

2 i 1/3 razy b= 7

4/7 razy x = 2 6/7

Answer 1

4/5 x b = 12/5 |x5

4b=12|:4

b=3

 

2i 1/3= 7/3

7/3 x b = 7 |x3

7x 3b=21

21b=21 |:21

b=1

 

4/7 x x = 2 (x?) 6/7 |x7

4 x 7x = 14 (x?) 6

28x=14(x?) 6

x = 3