Question

simulatinous eqution
x +y=5
x_y=4

Answer 1

Hi.

Your Question,

==> Simulataneous Equation

✏ x + y = 5...............[1]

and,

✏ x - y = 4.................[2]

Now,

by elimination method we have,

x + y = 5
x - y = 4
_______
2x + 0 = 9

==> 2x = 9

==> x = 9/2

Now,

Substituting the value of x in equation 1,

we have,

==> x + y = 5

==> 9/2 + y = 5

==> y = 5 - 9/2

==> y = (10 - 9)/2

==> y = 1/2

This implies,

x = 9/2 and y = 1/2.

Hope it helps you.

Answer 2

Hii ☺ !!


x + y = 5 ------(1)


And,


x - y = 4 -------(2)


From equation (1) , we get

x + y = 5

x = ( 5 - y ) -------(3)


Putting the value of x in equation (2) , we get


x - y = 4

5 - y - y = 4



-2y = -9


y = 9/2


Putting the value of y in equation (3) , we get


x = 5 - y = 5 - 9/2


x = 10 - 9 /2 = 1/2.


Hence,

x = 1/2 and y = 9/2