Question

resolver os sistemas:
x+y:6
x-y:4

Answer 1

$\left \{ {{x+y=6} \atop {x-y=4~~}} \right.$

Por adição.

$2x=10$

$x= \frac{10}{2}$

$\boxed{x=5}$

$5+y=6\\y=6-x\\y=6-5\\\boxed{y=1}$

Answer 2

  x+y:6
  x-y:4
   2x = 10
    x = 5

   x + y = 6
   5 + y = 10
        y =10-5
         y = 5