Question

Which is the solution of given simultaneous equations x-y=7 and x+y=11?

Answer 1

Answer:

x= 9. , y= 3

Step-by-step explanation:

x-y=7 ..,. ....(1).

x+y=11. ............(2)

Add equation 1 & 2

So we get ,

2x=18

x=9

Now put x=9 in equation 2

x+y=11

9+y=11

y=11-9

y=3

Answer 2

The solution of given simultaneous equations x-y=7 and x+y=11 are x=9, y=2.

Given:

x-y=7

x+y=11

To Find:

We have to find the solutions to these two equations.

Solution:

This is a simple problem for an equation.

Let us tackle this problem.

We can easily solve this problem as follows,

We are given,

x-y=7 ...............(i)

x+y=11  ..............(ii)

By adding equation (i) and equation (ii),

We get,

2x = 18

⇒x = 9

Therefore, the value of y = 11-9 = 2.

Hence, the solution of given simultaneous equations x-y=7 and x+y=11 are x=9, y=2.

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