Question

Va.rog..cine.ma.ajuta....8×(3+a)=72........(5+a)×b=30........9×(a+b)=8.........7×(4+a)=50.......(a+3)×3=30......8+a×5=45

Answer 1

Explicație pas cu pas:

24+8a=72

8a=72-24

a=48:8

a=6

5b+ab=30

b+ab=6

9a+9b=8

a+b=8/9/9

28+7a=50

7a=22

a=22/7

3a+9=30

3a=21

a=7

8+5a=45

5a=37

a=37/5