Question

3x+5y=9 and 5x+3y=7/than what is the value of x-y=?​

Answer 1

Answer: In order to eleminate “x”we need to make the co-efficient of “x” same on both the equation.

To achieve this

we will multiply 5 with equation 1

And multiply 3 with equation 2

On multiplication it will look like….

15x+25y=45

15x+9y=21

Now we will substract equation 1 and 2, it will give,

16y=24

y=1.5

Now, we will put y = 1.5 in equation 1 and solve

Upon solving we get,

x=0.5

Now, we got both x and y.

So, x+y=0.5+1.5=2