first number : x
second number : y
x + 2y = 1
2x + y = 11
multiply the first equation by 2...
2x + 4y = 2
2x + y = 11
subtract them
3y = -9
y = -3
use one of the equations to find x.
x + 2y = 1
x + 2(-3) = 1
x - 6 = 1
x = 7
So the first number is 7 and the second number is -3.
Hope this helped!! :)
