3x + 5y = -15 dan 5x + 5y= -5. tentukan nilai x dan y

eleminasi y
3x+5y= -15
5x+5y=-5
__________-
-2x= -10
x= -10/-2
x = 5

3x+5y= -15
3(5)+5y = -15
15+5y = -15
5y = -15-15
5y = -30
y= -6

3x + 5y = -15 |
5x + 5y= -5. | -
--------------------------
-2x + 0 = -10
x = -10 / - 2

x = 5

5x + 5y = -5
5(5) + 5y = -5
25 + 5y = -5
5y = -5 - 25
5y = -30
y= -30/5 = -6 jadi x , y ( 5 , -6 )