Question

solve by cross multiplication method :- 3x+2y=8 , 2x-3y-9=0​

Answer 1

Answer:

x = 42 / 13

y = -11/13

Step-by-step explanation:

3x + 2y = 8........*2

6x + 4y = 16......(1)

2x - 3y = 9........*3

6x - 9y = 27........(2)

substract (1) by (2)

6x + 4y = 16

6x - 9y = 27

- + -

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

0 + 13y = -11

y = -11/13

put the value of y in the origin of equation (1)

3x + 2y = 8

3x + 2(-11/13) = 8

3x - 22/13 = 8

3x = 8 + 22/13

3x = 104 + 22 / 13

3x = 126 / 13

x = 126 / 13*3

x = 126/39

x = 42 / 13