If a = 3 and b = a+3 find value of b.

you need to place the value of a when in the b eqution has an a like :

Explanation:

b = 3+3

b=6

6

Explanation:

when a = 3;

Substituting the value of a = 3 into the equation b = a + 3

So when, b = a +3

     and a = 3 as the value of given;

then;

     b =  a + 3

when a = 3

     b = (3) + 3

     b = 3 + 3

     b = 6

So therefore, b = 6.