👤

Stiind ca ax+ay-7=14 six+y=-3,calculati a-5 ;a+3

Răspuns :

 ax+ay-7=14=> a(x+y)-7=14a(x+y)=21
x+y=3 => a=21:3=7
a-5=7-5=2
a+3=7+3=10