Question

Set up an equation in the following cases.

a) In an isosceles triangle, the vertex angle is twice of base angle.

b) 20 years from now, Nancy will become 3 times as old as she is now.

c) John thinks of a number. If he takes 9 away from it and then divide by 2, the result is 8. Find the number.

Answer 1

Answer:

1st answer is

yes

2nd answer is

3rd answer is

4