Question

Find the value of x+y,if 3x-2y=5 and 3y-2x=3 value of xy

Answer 1

Step-by-step explanation:

3x - 2y = 6 (1) × 2

3y -2x = 3

-2x + 3y = 3

2x - 3y = -3 (2) × 3

6x - 4y = 12

6x - 9y = -9

- + +

5y = 21

$y = \frac{21}{5}$

y.................. (1)

3x - 2y = 6

$3x - 2 (\frac{21}{5}) = 6$

$3x - \frac{42}{5} = 6$

15x - 42 = 30

15x = 30 + 42

15x = 72

$x = \frac{72}{15}$