Răspuns :
x+y=95
7x+12y=940
x=95-y
7(95-y)+12y=940
665-7y+12y=940
5y=940-665
5y=275
y=275/5
y=55
x=95-55
x=40
40ladite
55 lazi
7x+12y=940
x=95-y
7(95-y)+12y=940
665-7y+12y=940
5y=940-665
5y=275
y=275/5
y=55
x=95-55
x=40
40ladite
55 lazi
x=nr ladite y=nr lazi x+y=95⇒y=95-x 7x+12y=940 7x+12*95-12x=940 1140-940=5x x=200:5= 40 ladite iar y=95-40=55 lazi