Объяснение:
1.
(x+3)/(1+3)=(y-1)/(2-1)
(x+3)/4=y-1
y-1-(x+3)/4=0
2.
(x-7)/(-5-7)=(y-2)/(2-2)
(x-7)/-12=(y-2)/0
-12(y-2)=0
-12y+2=0
Объяснение:
1.
(x+3)/(1+3)=(y-1)/(2-1)
(x+3)/4=y-1
y-1-(x+3)/4=0
2.
(x-7)/(-5-7)=(y-2)/(2-2)
(x-7)/-12=(y-2)/0
-12(y-2)=0
-12y+2=0