Berapakah hasil x-2y=10 dan 3x+2y=

X – 2y = 10
x = 10 + 2y
(10 + 2y) – 2y = 10
2(5 + y) – 2y = 10
5 + y – 2y = 10/2
5 + y – 2y = 5
y – 2y = 5 – 5
-y = 0
y = 0

x – 2(0) = 10
x – 0 = 10
x = 10 + 0
x = 10

3x + 2y = 
3(10) + 2(0) = 
30 + 0 = 30