Question

if x+y=4, x-y=3, then x+2y=? details solve this

Answer 1

Answer:

x+2y =5

Step-by-step explanation:

x+y=4

x-y=3

therefore y=1 and x=3

x+2y= 3+2= 5

Answer 2

Answer:

x+y=4....1

and

x-y=3....2

then by using elimination method, solving equations 1 and 2 we get,

x=7/2 and y=1/2

hence, x+2y=

7/2+2*1/2=9/2