Question

Dados os vetores u=3i-j e v=-i+2j, Determinar o vetor x tal que 4(u-v)+1/3x = 2u-x?

Answer 1

4(u-v)+1/3x=2u-x
4u-4v=1/3x=2u-x
1/3x+x =2u-4u+4v
4/3x= -2u+4v
4/3x= -2(3, -1)+ 4(-1,2)
4/3x= (-6,2)+(-4,8
4/3x=(-10,10)
Multiplicando cruzado
x= -30/4:2 , 30/4 :2
x= -15/2, 15/2