diketahui sistem persamaan 4x - y = 18 dan 3x + 2y = 19. nilai 4x + 7y =.....?

4x-y=18 x3
3x+2y=19. x4

12x-3y= 54
12x+8y= 76
_________-
-11y=-22
y= 2
subtitusikn
4x-y=18
4x-2=18
4x= 20
x=5

4x+7y= 20+14
= 34


semoga mengerti