Question

I need some help figure out how to setp up the problem

Answer 1

looking at the diagram, we can see that

Angle KQR + angle PQK = angle PQR

We know that

angle PQK = 70 degrees

angle PQR = 21x + 13

angle KQR = 12x + 6

This means that

12x + 6 + 70 = 21x + 13

21x - 12x = 70 + 6 - 13

9x = 63

x = 63/9

x = 7

Angle KQR = 12 * 7 + 6 = 84 + 6

Angle KQR = 90 degrees