kak tolong dikerjakan pakai caranya ya

[tex]2y = 56 \\ y = 28[/tex]

[tex]4x = 56 \\ x = 14[/tex]

[tex]x + y = \\ 28 + 14 = 42(c)[/tex]

56 = 2y
y = 56:2
y = 28

56 = 4x
x = 56:4
x = 14

x + y = 14+28
= 42

semoga membantu