Question

X-3y-7=0
3x-5y-15=0 cross multiplication method

Answer 1

Step-by-step explanation:

iv)

X – 3y  - 7 = 0

3x – 3y  -15 = 0

Compare with



we get 

a1 = 1 ,           b1 = -3  ,        and     c1 = -7 

a2  = 3 ,          b2  = -3           and     c2 = -15



Hence



So it will have unique solutions

Use the formula of cross multiplication



Plug the values in this formula we get

 

X = 24/6 = 4

Y = -6/6 = - 1