Question

sabe-se que as retas 2x-y+m-2n=0 e 3x/2-y+n-3=0 são concoreentes. calcule o valor de m+n

Answer 1

3x/2-y+n-3=0  X=1 e y=2
3.1/2-2+n-3=0
3/2-2+n-3=0
3-4+2n-6=0
-10+3+2n=0
-7+2n=0
2n=7
n=7/2
2x-y+m-2n=0
2.1-2+m-2.7/2=0
m-14/2=0
m=7
m+n= 7/2+7=7/2+14/2=21/2