Question

Find x and y. Please help!!

Answer 1

Answer:

x=3

y=2

Step-by-step explanation:

Let $\frac{1}{x+y}$=u and $\frac{1}{x-y}$=v

20u+3v=7                     Multiply with 8

15u+8v=11                     Multiply with 3

160u+24v=56

-45u-24v=-33

115u=23

u=$\frac{1}{5}$

Putting u=$\frac{1}{5}$

20×$\frac{1}{5}$+3v=7

4+3v=7

3v=7-4

3v=3

v=1

u=$\frac{1}{5}$

x+y=5

x-y=1

2x=6

x=3

putting 3

3+y=5

y=5-3

y=2