ANSWER

EXPLANATION
The given logarithmic expression is

Recall the quotient law of logarithms:

We apply this property to obtain;

You now fill in the blank with 11 on the right hand side.
7+3= 10
Let's take 1,400 is to be seperated between A and B
Amount of money A will get = 1400* 7/10= 980
Amount of money B will get = 1400* 3/10= 420
Checking the answer:
980+420 = 1,400
Hence, 1,400 will be shared by ratio 7:3 is 980 and 420.
Correct me, if I am wrong :)
Have a great day!
Thanks!
Y-1=4(x-(-2))
y-1=4x+8
Is this what you wanted ?