Question

ajutor dau coroana e urgent pls​

Answer 1

Răspuns:

a+25-3=30

a+22=30

a=30-22

8a=48

a=48÷8

a=6

12-10=b-2

2=b-2

b=2+2

b=4

21÷7=a÷10

3=a÷10

a=10×3

a=30

64-45=30-c

19=30-c

c=30-19

c=11

2c-39=63-2

2c=61+39

2c=100

c=100÷2

c=50

3d=30

d=30÷3

d=10

15÷d=30-7-20

15÷d=3

d=15÷3

d=5