Question

If x + y = 10 and x - y = 4, find the value of x-y?.​

Answer 1

Answer:

my dear friend your answer is

Step-by-step explanation:

For 2 equations, you need to either eliminate one or substitute one into another.

By elimination: (eliminate y from the equation)

Add both equations together.

x+y+x-y = 10+4

2x=14

x=7

Then substitute the value of x into any of the equations.

7-y=4

y=3

By substitution:

From one equation, x+y=10

so x=10-y

Substitute this equation into the other one.

(10-y)-y=4

10–2y=4

2y=6

y=3

Then substitute the value of y into the equation made.

x=10–3=7

Answer 2

Step-by-step explanation:

here (x-y) has already given that is 4

if you want to know the value of x and y then

x+y=10

x-y=4

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2x=14

x=7

x+y=10

=>7+y=10

=>y=3