The difference between two numbers is 4. Twice the first number plus three times thesecond number is 28. Find the two numbers.
+73 let's define two variables for the first and second numbers: x and y.
now we can create a system of equations -
x - y = 4.
2x + 3y = 28.
i'm going to use elimination for this one, though substitution works just as well! i will multiply the first equation by 2.
2x - 2y = 8
2x + 3y = 28
so now we can subtract these two equations.
5y = 20
y = 4
to solve for x, we plug in the value for y in one of the initial equations.
x - 4 = 4
x = 8
and we're done! hope this helped! please let me know if you are confused about anything i did 
+592 x - y = 4
2x + 3y = 28
Use system of equations:
2x - 2y = 8
2x + 3y = 28
-----------------
-5y = -20
y = 4
x - y = 4
x - (4) = 4
x = 8
The two numbers are 4 and 8 :)
