can any of help me with this
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7x+5x=12x
9x+7x=26x
12x+26x=38x=100
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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.
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