Question

Repede dau coroana !​

Answer 1

Explicație pas cu pas:

4.

a-b=300

400-100=300

b=c×6

12=2×6

c=d+14

15=1+14

d=e:6

2=3:6

e:60=19

e=19×60

e=1140

1140:60=90

5.

a×b=10

5×2=10

b=c:9

2=18:9

c=d:3

2=6:3

d+e=50

30+20=50

e×9=207

e= 207:9

e=23

23×9=207