selesaikan sistem persamaan berikut ini dengan metode eliminasi (a) 2x - 3y= 15 4y = 3x -19 (b) x + 5y =10 3x - 4y = 12

a)
2x - 3y = 15 --> 2x - 3y = 15 --> 6x - 9y = 45
4y = 3x - 19 --> 3x - 4y = 19 --> 6x - 8y = 38

6x - 9y = 46
6x - 8y = 38
___________ (-)
-y = 7
y = - 7

2x - 3y = 15
2x - 3.(-7) = 15
2x + 21 = 15
2x = -6
x = -3

b)
x + 5y = 10 --> 3x + 15y = 30
3x - 4y = 12 --> 3x - 4y = 12

3x + 15y = 30
3x - 4y = 12
___________(-)
19y = 18
y = 18/19

x + 5y = 10
x + 5. 18/19 = 10
x + 90/19 = 10
x = 10 - 90/19
x = 100/19
x = 5 5/19

semoga bisa bantu ya