Question

2x+3y=9 and 3x+4y=9 in cross multiplication

Answer 1

Answer:

y = 9 and x = -9

Step-by-step explanation:

2x+3y=9                                  (i)

3x+4y=9                                  (ii)

Multiply 3 in (i) and 2 in (ii)

Then,

6x+9y = 27                             (iii)

6x + 8y = 18                            (iv)

Subtract (iv) form (iii)

y = 9

Put value in (i)

2x + 3(9)= 9

2x = 9-27

2x= -18

x= -9