Question 30451
y + 18 = 16x
=>y=16x-18

0.5x + 0.25y = 36 (multiply both sides by 4)
=>2x+y = 144
Substitute y=16x-8
=>2x+16x-8=144
=>18x=152
=>x=152/18=9

y=16x-18
=>y=16(9)-18
=>y=144-18=126

Answer: x=9 and y=126