Question

can any of help me with this​

Answer 1

7x+5x=12x

9x+7x=26x

12x+26x=38x=100

Answer 2

Answer:

A=35yrs

B=25yrs

Step-by-step explanation:

Let the present age of A= 7x years

The present age of B= 5x years

After 10 years, their ages will be

A=7x+10 years and

B=5x+10 years

The ratio of their ages after 10 years is 9:7.

∴ 7x+10/5x+10=9/7

⇒49x+70=45x+90

⇒49x−45x=90−70

⇒4x=20

⇒x=5

∴ Present age of A= 7×5=35 years and present

age of B= 5×5=25 years.