jika 8x-5y=27 dan 3x+5y=17 maka nilai 5x+2y=

8x-5y=27 kali 3
3x+5y=17 kali 8
24x-15y=81
24x+40y=136 dikurangi
-55=-55
y=-55/-55=1
8x-5y=27
8x-5(1)=27
8x=27+5
x=32/8
x=4
sehingga 5x+2y
=5(4)+2(1)
=20+2
=22

8x-5y=27
3x+5y=17
-
5x. = 10
X. = 2

3x+5y =17
3(2)+ 5y = 17
6+ 5y. = 17
5y = 17 -6
Y. = 11- 5
Y= 6

5x + 2y =
5(2)+ 2(6) = 22