The system has infinitely many solutions. Rearranging the left side of the 2nd equation and subtracting 3a from both sides gives
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Answer:
My age is 12 years.
Step-by-step explanation:
Given:
Sister's age = 10 years
Let my age be x.
Now according to question;
my brother's age is 1/3 of my age
So brother's age =
Also according to question;
my sister is 6 years older than my brother;
Sister's age =
Also given Sister's age = 10 years
hence equation to find my age will be expressed as below;
Brothers age =
Hence my age is 12 years.