Question 167571
The smaller of two numbers is 3 less that the larger.  Twice the larger plus 4 times the smaller is 36.  Find the numbers
solution:

Let the two numbers be  x and y.
Let the smaller of the two be x
x= y-3
2y+4x = 36

Hence we haev to solve the following linear syste of equation
x-y = -3
4x+2y = 36=> 2x+y = 9

adding the two equations,
3x = 6=> x= 2
y = 5
The numbers are 2 and 5.