Question

3a+b=225, b-a=25 solve.

Answer 1

If you are solving by substituting A=50 and B=75

Answer 2

Answer : The value of 'a' and 'b' is, 50 and 75 respectively.

Step-by-step explanation :

As we are given two equations.

$3a+b=225$      ...........(1)

$b-a=25$     ............(2)

or,

$b=25+a$           ...........(3)

Now put equation 3 in equation 1, we get the value of 'a'.

$3a+b=225$

$3a+25+a=225$

$4a+25=225$

$4a=225-25$

$4a=200$

$a=\frac{200}{4}$

$a=50$

Now put the value of 'a' in equation 3, we get the value of 'b'.

$b=25+a$

$b=25+50$

$b=75$

Thus, the value of 'a' and 'b' is, 50 and 75 respectively.