Answer:
x - y = - 1
Step-by-step explanation:
Given the 2 equations
5x + 4y = 13 → (1)
4x + 5y = 14 → (2)
Subtract (2) from (1) term by term , that is
(5x - 4x) + (4y - 5y) = 13 - 14
x = 1
y = 2
x - y = -1
5x + 4y= 13, then 4y = 13 - 5x, then y = (13 - 5x)/4
4x + 5y = 14
substitute for y:
4x + 5(13 - 5x)/4 = 14
simplifying:
4x + (65 - 25x)/4 = 14
4x + 16.25 -6.25x = 14
-2.25x = -2.25
y = (13 - 5)/4 = 2
3 is the answer .
-4 is the answer :)))))))))
55x + 35y = 200
1:5
13cm: 65cm = 13cm/65cm =13/65 = 1/5= 1:5
