Răspuns :
a xb + a x c= 36
b + c = 9
a x ( b + c ) = 36
a x 9 = 36
a = 36 : 9
a = 4
b + c = 9
a x ( b + c ) = 36
a x 9 = 36
a = 36 : 9
a = 4
axb+axc=36 si b+c=9
Dam factor comun pe a:
ax(b+c)= 36.
ax9=36.
a= 36:9.
a= 4