Question

(4) Find x if x + y = 5,and x-y=7​

Answer 1

Answer:

x + y = 5

x-y = 7

2x =12

x=6

so,

y = 3

Answer 2

Answer:

x = 6

Step-by-step explanation:

Using elimination method,

x+y = 5

x-y = 7

- +. -

________

2y = -2

y = -1

Substituting this in any equation

x= 6