Răspunsuri

2014-08-31T14:26:24+03:00
A*(x+y)-8=100
a*12=100+8
a*12=108
a=108:12
a=9

a-(x+y-7)=
9-(12-7)=
9-5=4
2014-08-31T15:37:32+03:00
ax+ay-8=100
 x+y=12
a(x+y)-8=100
ax12-8=100
12a=108
a=9


a-(x+y-7)=9-(12-7)=9-5=4