Răspuns :
x-numarul
x:3+x+3=27
aducem la același numitor 3
x+3x+9=81
4x=72
x=72:4
x=18
P:
18:3+18+3=6+18+3=27
x:3+x+3=27
aducem la același numitor 3
x+3x+9=81
4x=72
x=72:4
x=18
P:
18:3+18+3=6+18+3=27