Question

Determine o valor de X e Y na igualdade:
  |x 3 | + |-1 5 | = |4 8 |
  |4 y |     |8 y |     |12 -4|

Answer 1

$\left[\begin{array}{ccc}x&3\\4&y\end{array}\right] + \left[\begin{array}{ccc}-1&5\\8&y\end{array}\right] = \left[\begin{array}{ccc}4&8\\12&-4\end{array}\right] \Rightarrow \left \{ {{x - 1 = 4 } \atop {2y = -4 }} \right. \Rightarrow \boxed {x = 5} \ \\ \\ \boxed { y = -2 }$