Question

A minus b is equal to 2 comma a + b equal to 3

Answer 1

a-b=2.........equation 1

a+b=3.........equation 2

From equation 1 make (a) the subject of formula

a= 2+b.............equation 3

Put equation 3 into equation 2

2+b+b=3

2+2b=3

2b=3-2

2b= 1

b= ½

Put b=½ into equation 1

a-½ =2

a=2+½

a=5/2

a=1½

Hence a=1½, b=½

Answer 2

a-b=2...........(1)
a+b=3..........(2)
on adding we get
2a=5
a=5/2
Putting a=5/2 in (2) we get
$\frac{5}{2} + b = 3 \\ b = 3 - \frac{5}{2} \\ b = \frac{6 - 5}{2} \\ b = \frac{1}{2}$