Question

find the value of X if x -y=9,x +y=5​

Answer 1

Answer:

x=7

Step-by-step explanation:

x+y=5

x-y=9

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By solving we get,

2x=14

x=14/2

x=7.

Answer 2

Answer:

x=7

Step-by-step explanation:

Using Substitution method,

x-y = 9. ------ eq 1

x+y = 5. -------eq 2

Now,

From eqn 1,

x= 9+y. -------eq 3

Put eq 3 in eq 2,

9+y+y=5

9+2y=5

2y= 5-9

2y= -4

y= (-2)

Now,

Put y in eq2,

x+ (-2) = 5

x - 2 = 5

x= 5+2

x= 7