Question

$\left[\begin{array}{ccc}x+y=8\\x-y=-3\end{array}\right]$

x+y=8 I x-y=-3

Answer 1

Boa tarde

x + y = 8
x - y = -3

soma
2x = 5
x = 5/2

5/2 + y = 16/2
y = 11/2