Question

X+|x|+y=10
x+|y|-y=12
x+y=??

Answer 1

X + x + y = 10
2x + y = 10

x + y - y = 12
x = 12

2x + y = 10
2 * 12 + y = 10
24 + y = 10
y = 10 - 24
y = -14

x + y = 12 + (-14)
         = 12 - 14
         = -2

Semoga membantu. Tapi, maaf kalau salah ~

Answer 2

2x + y= 10. x1
x + 2y = 12. x 2
-------------

2x + y = 10
2x + 4y= 24. -
---------------
-3y = - 14
y = 14/3

subtitusikan ke salah satu persaan di atas
2x + y = 10
2x + (14/3) = 10
2x = 10 - 14/3
2x = 30/3 - 14/3
2x = 16/3
x = 16/3:: 2
x = 16/4 x 1/2
x = 16/8
x = 2

jadi x + y =

= 2 +14/3
= 6/3 + 14/3
= 20/3