Question

if 2x+3y=25 and 2x-3y=12 find xy
pls help​

Answer 1

Answer:

x = 9.125

y = 2.1667

Step-by-step explanation:

On adding both equations, we get

2x + 3y = 25

2x - 3y = 12

---------------------

4x = 37

x = 37/4 = 9.25

Now for finding y, it is

2x + 3y = 25

2(9.25) + 3y = 25

18.5 + 3y = 25

3y = 25-18.5 = 6.5

y = 6.5/3 = 65/30 = 13/6 = 2.1667