Răspuns :
[tex]a-b=36 \\ a=4b \\ Inlocuim~in~diferenta: \\ 4b-b=36 \\ 3b=36 \\ b=36:3 \\ b=12 \\ a=4*12 \\ a=48. [/tex]
a-b=36
a=4x b
4 xb-b=36
4b-b=36
3b=36
b=12
a=4 x b
a=12x 4
a=48
verificare48-12=36
a=4x b
4 xb-b=36
4b-b=36
3b=36
b=12
a=4 x b
a=12x 4
a=48
verificare48-12=36