Question

22. Completează:
a x 3 + 13 = 40
7 x a+ 9 = 30
ax 3 + 8 = 20
a x 3 + 25 = 40
9 x a+ 3 = 30
a x 8 - 4 = 20 ​​

Answer 1

Răspuns:

a×3+13= 40

a=40-16= 24

a=24

7×a+9=30

30-9=21

21= 7×a

21: 7= 3

a = 3

a×3+8=20

20-8=12

12=ax3

12:3=4

a=4

a×3+25=40

40- 25 = 15

15= a× 3

15:3=5

a=5

9×a+3=30

30-3=27

27=9×a

27: 9= 3

a= 3

a×8-4=20

20+4=24

24=a×8

24:8=3

a=3

Answer 2

Răspuns:

9×3+13=40 7×3+9=30 4×3+8=20 5×3+25=40 9×3+3=30 3×8-4=20