Question

Afla valoarea lui:"a" 72:(a+3)=8; 72:(a•3)=8; 72:(a-2)=8; 72:(a:2)=8

Answer 1

72:(a+3)=8
a+3=72:8
a+3=9
a=9-3
a=6

72:(ax3)=8
ax3=72:8
ax3=9
a=9:3
a=3

72:(a-2)=8
a-2=72:8
a-2=9
a=9+2
a=11

72:(a:2)=8
a:2=72:8
a:2=9
a=9x2
a=18