Question

Alguém me ajude a resolver isso, igualdade de matrizes

Answer 1

{x+y=4 -----> x= 4-y
{2x-3y=13

2(4-y)- 3y= 13                     x=4-y
-5y=5                                  x=4-(-1)
y= -1                                   x=5