Answer:
all work is pictured and shown
X - 2y = -10 --> x = 2y -10
3x + 5y = 25 --> 3(2y-10) + 5y = 25 --> 11y - 30 = 25 --> 11y = 55 --> y = 5
x = 2y -10 --> x = 2(5) -10 --> x =10 -10 --> x =0
Answer (0,5)
The percent increase in your rent is 12.5 percent. Hope it help!
5000-850=
$4150 left to raise
$4150/83 students=
$50/student