Question

dados os vetores u=(3,-1) e v=(-1,2), determinar o vetor x tal que 3x-(2v-u)=2(4x-3u)

Answer 1

3x-2v+u=8x-6u
-2v+u+6u=8x-3x
-2v+7u=5x
-2(-1,2)+7(3,-1)=5x
(2,-4)+(21,-7)=5x
(23,-11)=5x
\$\boxed {x=(23/5,-11/5)}$