if you know the tables then you can do that easily.
Y + 4x = 8
y = 8 - 4x
substitute 8 - 4x for y in the other equation.
5x + 2(8 - 4x) = 13
5x + 16 - 8x = 13
-3x = -3
x = 1
y = 8 - 4(1) = 4
The answer is 49
Hope this helps
it's x ≤ 3 :))) I found it out after realizing what you were asking
