Question

If (3x+1):(5x+3) is the triplicate ratio of 3:4 find value of x

Answer 1

If x : y = 4 : 5. Find the ratio 10x + 3 y : 5 x + 2 y
Solution: (10 x + 3 y) : ( 5 x + 2 y ) =
10x 3y
5x 2y


x
10 3
y
x
5 2
y
    
 
    
 
=
4
10 3
5
4
5 2
5
 
    
 
=
8 3 11
4 2 6

Answer 2

The value of x = - 1/7

3x+1/5x+3= 1/3(3/4)
3x+1/5x+3= 1/4
4(3x+1) = 5x+3
12x+4= 5x+3

x=-1/7