Question

sabendo que o ponto P(a,a-3)pertençe a reta da equaçao x+3y-1=0,calcular as cordenadas do ponto P.

Answer 1

a+3(a-3)-1=0 a+3a-9-1=0 4a-10=0 a=10/4 a=5/2=x Y=5/2-3= -1/2 Assim P(5/2,-1/2)