Răspunsuri

2014-10-21T20:37:01+03:00
A) cX(a+b)=126
9X(a+b)=126
a+b=126:9=14

b)cX(a+b)=168
12X(a+b)=168
a+b=168:12=14

c)a-bXc=240
16Xc=240
c=240:16=15

d)e la fel :)))