Question

Calcule o valor de x e y nas seguintes igualdades:

$<var>\left[\begin{array}{ccc}-3&x\\4&-1\\\end{array}\right] + \left[\begin{array}{ccc}y&-5\\3&1\\\end{array}\right] = \left[\begin{array}{ccc}8&1\\7&0\\\end{array}\right]</var>$

 

Answer 1

(-3)+y=8      x+(-5)=1
4+3=7          (-1)+1=0       

y=8+3
y=11


-5+x=1
x=1+5
x=6