Răspuns :
axb=672
b=672/a
(a+10)xb=992
(a+10) * 672/a=992
672a+6720=992a
672a-992a= -6720
-320a = -6720
320a=6720
a=21
b= 672/21
b=32
b=672/a
(a+10)xb=992
(a+10) * 672/a=992
672a+6720=992a
672a-992a= -6720
-320a = -6720
320a=6720
a=21
b= 672/21
b=32
axb=672
(a+10)xb=992, axb+10b=992, 672+10b=992
10b=992-672
10b=320
b=320:10
b=32
a=672:32
a=21
(a+10)xb=992, axb+10b=992, 672+10b=992
10b=992-672
10b=320
b=320:10
b=32
a=672:32
a=21