Question

Aflati numarul necunoscut: (a+80):2=50. Ajutatima urgenttttt!!!!!

Answer 1

(a+80):2=50
a+80=50x2
a+80=100
a=100-80
a=20

Answer 2

$(a+80):2=50 \\ a+80=50*2 \\ a+80=100 \\ a=100-80 \\ a=20$