Question 440320
x+y=45
11x+10y= ?

i've already tried 100, 80, & 81. all of them were no solution.

i already know how to graph it & solving it algebraically . 

i just need help finding a number to make it a solution.
--------------------------
Actually, you can put any number in place of the ? (except 45) and solve the 2 equation system. 
For example
x+y=45
11x+10y = 0
y = 45 - x
11x + 10*(45-x) = 0
11x + 450 - 10x = 0
x = -450
y = 495
-----------
Or,
x+y=45
11x+10y= 1000
y = 45 - x
11x + 10(45-x) = 1000
x + 450 = 1000
x = 550
y = -505