teman tolong bantuin no 34,35,40 donk lagi butuh ni!! pakai cara yah plisss sekarang lagi butuh!! fast yah!!

34.
y = x + 5
y = 3x - 7
_______-
0 = -2x + 12
2x = 12
x = 6

y = x + 5
y = 6 + 5
y = 11

himpunan penyelesaian = {(6, 11)} (C)

35.
y = 7x + 8 >> 7x - y = -8
3x + y = 58 >> 3x + y = 58
_________+
10x = 50
x = 5 (A)

40.
2b + 1p = 6000
2b + 3p = 9000
_____________-
-2p = -3000
p = 1500

2b + 1p = 6000
2b + 1500 = 6000
2b = 4500
b = 2250 (A)