Question

please give full solution

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Answer 1

Answer:

A=3 b=3 it is your ans please tell me I will give solution

it is the question of linear equations in two variables.

a=4x

b=

Answer 2

Answer:

age of A is 30 and that of B is 21

Step-by-step explanation:

let present ages of A, B be x, y respectively.

6 years ago, their age's ratio is (x-6)/(y-6) = 4/3

it's simplification gives an equation 3x-4y+6=0

let this be equation 1

9 years from now, their age's ratio is (X+9)/(y+9)=7/6

it's simplification gives an equation 6x-7y-9=0

let this be equation 2

solving equations 1 and 2, you get x=30 and y=21