Question

Aflați a:6×4+a=31;4×8-a=28;9×5+a=83

Answer 1

《Salut,》

6 × 4 + a = 31
a = 31 - ( 6 × 4 )
a = 31 - 24
a = 7

Proba:

6 × 4 + 7 = 31 ✔




4 × 8 - a = 28
a = ( 4 × 8 ) - 28
a = 32 - 28
a = 4

Proba:

4 × 8 - 4 = 28 ✔



9 × 5 + a = 83
a = 83 - ( 9 × 5 )
a = 83 - 45
a = 38

Proba:

9 × 5 + 38 = 83 ✔


$Eckram$