One number is 3 more than another number. if you add 12 to 4 times the first number, the result is 5 times the second number. Find the numbers

first is - 3, second number is 0

Step-by-step explanation:

you have two equations x+3=y and 4*x+12=5*y

Use the first one and write y in terms of x in the second equation:

4*x+12=5 * (x+3)

4*x+12=5*x+15

12=5*x-4*x+15

12=x+15

x=-3