Question

Ne gandim la un numar, il inmultim cu 3, iar apoi adaugam 40 la rezultat, obtinand 100. Sa se afle numarul.

Answer 1

x .3 +40=100
X .3=100-40
X .3=60
X=60:3
X=20
. =INMULTIRE

Answer 2

a×3=b+40=100

b+40=100

b=100-40

b=60

a×3=60

a=60÷3

a=20