Question

cross multiplication method 2x+5y-1=0,7x-1y-9=0​

Answer 1

Answer:

x= -4/3

y=1/3

Step-by-step explanation:

2x+5y = 1

a1= 2, b1= 5, c1= 1

7x-y= 9

a2= 7, b2= 1, c2= 9

    x           y            1    

5          1             2              5

1           9            7               1

x/(5*9) - (1*1)  =y/(7*1) -(2*9) =1/(2*1)-(5*7)

x/45-1= y/7-18= 1/2-35

x/44 = -y/11 =-1/33

x/44=-1/33

x=-44/33

x= -4/3

-y/11 =-1/33

y/11 =1/33

y=11/33

y=1/3

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