Răspunsuri

2014-05-02T20:35:51+03:00
Xplus y egal 18 18-x-y egal 16 x egal 18-y 18-18 plus y plus y egal 16 x egal 18- y y egal 8 x egal 10
2014-05-02T20:56:36+03:00
A+b=18
(a+b)-(a-b)=16

=>18-(a-b)=16
a-b=18-16
a-b=2
a=b+2

b+2+b=18
2b+2=18
2b=16
b=8 =>a=10