Question

if x + y = 2 , x - y = 4 , then 2x + 2y is
( a ) 5
( b ) 4
( c) 3
( d) 2​

Answer 1

Answer:

if 2x + 2y = 4x it  will be b

Step-by-step explanation:

Answer 2

x+y=2 (1)

x-y=4 (2)

adding (1) and (2)

x+y=2

+(x-y)=+(4)

--> 2x=6. x=3

putting value of x in equation (1)

x-y=2. (3)+y=2. y=-1

therefore 2x+2y=2(3)+2(-1)

=6-2

=4

option (b)4

It may be useful!