Question

(A) x+y= 1 and 2x-y-1 (B) 2x + y = 2 and 2+ y = 2 (C) 2x - y = 2 and 4x - y - 4 (D) y - x= 0 and x-y-1​

Answer 1

Step-by-step explanation:

A) x+y=1-----(1)

2x-y=1------(2). C) 2x-y=2 -----(1)

adding 1 and 2. 4x-y=4-----(2)

3x=2

x=2/3. ( 2)-(1) we get,

from(1), 2/3+y=1. 2x=2

y=1-2/3. x=1

y=3-2/3 from (1)

y=1/3 2X1-y=2

B) 2x+y=2----(1) y=0

2+y=2 ----(2)

(1)-(2) we get. D). y-x=0-------(1)

2x-2=0 x-y=1 ------(2)

x=0, y=0

2x=2

x=1

from (2) y=0