The present age of Chaudhary is 21 years and Mrs Pandey is 14 years.
<h3>How to write Linear Equation in two variable?</h3>
An equation is said to be linear equation in two variables if it is written in the form of ax + by + c=0, where a, b & c are real numbers and the coefficients of x and y, i.e a and b respectively, are not equal to zero.
For example, x + 4y = 13 and -21x + 5y = 2 are linear equations in two variables.
Let the present age of Chaudhary is 'X' years and Mrs Pandey is 'Y' years.
So, according to the question:
sum of their present age is 35 years.
X + Y = 35 ----------- ( i )
also, Chaudhary age was thrice when Chaudhary were old as the Mrs Pandey.
Now,
X = 3 ( Y - (X - Y) )
X = 3 ( Y - X + Y )
X = 3 ( 2Y - X )
X = 6Y - 3X
4X = 6Y
2X = 3Y
X = 3Y / 2 ------------- ( ii )
Put value of X from equation ( ii ) in equation ( i ):
3Y/ 2 + Y = 35
5Y = 70
Y = 14 years
Put value of Y in equation ( ii )
X = ( 3 x 14 ) / 2
X = 21 years
Hence, The present age of Chaudhary is 21 years and Mrs Pandey is 14 years.
Learn more about "Linear equation" from here: brainly.com/question/11897796
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