Question

If x+y=10 and x-y=4. then find the value of

Answer 1

Answer:

Step-by-step explanation:

x+y=10

x-y=4

adding

2x=14

x=14/2=7

7+y=10

y=10-7=3

Answer 2

Answer:

x=7 y=3

Step-by-step explanation:

solve x+y for x

x+y-y=10-y

x=10-y

substitute 10-y in x-y for x

x-y=4

10-y-y=4

10-2y=4

10-2y-10=4-10 (add -10 to both sides)

-2y= -6

y= -6/-2 = 3

x+y=10

x+3=10

x=10-3=7

x-y=4

7-3=4