4x + 3y= 13 x + y= 4 naka 2x+y=

4x + 3y = 13
x + y = 4
2x + y = ....

x = 4-y

4x + 3y = 13
4(4-y) + 3y = 13
16 - 4y + 3y = 13
-y = 13 - 16
-y = -3
y = 3

x = 4-y
x = 4-3
x = 1

2x + y
= 2(1) + 3
= 2 + 3
= 5