Question

Afla nr necunoscut si verifica rezultatele;a×3=21; 2×a=12;24÷a=3; a÷2=8​

Answer 1

Salutare!

a×3=21

a=21:3

a=7

v: 7×3=21

2×a=12

a=12:2

a=6

v: 2×6=12

24:a=3

a=24:3

a=8

v: 24:8=3

a:2=8

a=8×2

a=16

v: 16:2=8

#Succes!

Answer 2

$a \times 3 = 21 \\ a = 21 \div 3 \\ a = 7$

$2 \times a = 12 \\ a = 12 \div 2 \\ a = 6$

$24 \div a = 3 \\ a = 24 \div 3 \\ a = 8$

$a \div 2 = 8 \\ a = 8 \times 2 \\ a = 16$