yg no 9 tolong bantuin ya

2x - 3y = 4
5x + 3y = 10
_________+ eliminasi y
7x = 14
x = 14/7
x = 2

sub nilai x = 2 ke pers 2x - 3y = 4 sehingga
2(2) - 3y = 4
4 - 3y = 4
-3y = 4 - 4
-3y = 0
y = 0

nilai 19(x - y) = 19(2-0) = 19(2) = 38