Question

x + y = 29 x- y = 23 método da adição

Answer 1

x + y = 29
x - y = 23
--------------
2x = 52
X = 52/2
x = 26

26 + y = 29
y = 29 - 26
y = 3

x - y = 23
26 - 3 = 23

Answer 2

x + y = 29
x- y = 23

x+x+(y-y)=29+23

2x=52

x=52/2

x=26

y=29-x

y=29-26

y=3

x=26 e y=3