Answer:
x=50
Step-by-step explanation:
Equation
a + 27 = 4a - 15
3a - 15 = 27
3a = 42
a = 14
Ok so
1/4 of total eaten
3/4 left
3/5 of 3/4 eaten
9/20 left
18=9/20 of whole
multiply both sides by 20
360=9 of whole
divide both sides by 9
40=whole
40 total originlly