Question

x-y=1 and 9x+3y=4 solve this by cross multiplication method .​

Answer 1

Answer:

(x,y) = (7/12,-5/12)

Step-by-step explanation:

Given equation :  x-y=1 and 9x+3y=4

                            x-y-1=0  and  9x+3y-4=0

     x          y         1

-1          -1         1         -1        =>     $\frac{x}{4+3} =\frac{y}{-9+4} =\frac{1}{3+9}$

3         -4         9         3       =>   x = 7/12  ,  y = -5/12