Maths~~~~~~~~~~~~!

1.For 2 consecutive multiples of 4,the larger number is less than twice of the smaller one by at least 16.find the minimum values of the two numbers.
2.in each of the following ,if y</4  ,express the range of values of x by an inequality.
a)  x = y/2
b)x=4y+5
c) x=10-3y
3.For two consecutive multiples of 3, 5 times the larger number is not less than 2 times the smaller number plus 45. Find the minimum values of these two numbers.

*Please show the process, thanks.