Help mee quick and explain to me in an easy way as posible

Bags of limes = 4
Total limes in each bag = m
Total limes = 4m
ATQ
4m - 7(4)= 16
4m = 16+28
4m = 44
m = 44/4
m = 11
Value of m = 11
Must click thanks and mark brainliest