Question

calculați nr necunoscut :(a×5):2=40:4​

Answer 1

(a×5):2=40:4

(a×5)=10×2

a=20:5

a=4

(4×5):2=40:4

Answer 2

Sᴀʟᴜᴛᴀʀᴇ!

$(a \times 5) \div 2 = 40 \div 4 \\ (a \times 5) \div 2 = 10 \\ (a \times 5) = 10 \times 2 \\ a \times 5 = 20 \\ a = 20 \div 5 \\ a = 4 \\ verificare \\ (4 \times 5) \div 2 = 20 \div 2 = 10 \:$

Succes!