Question

triangle POR and triangle pqr is a linear pair if triangle p o r is equal to 3 X and triangle pqr is equal to 2 X + 10 degrees then find the value of x

Answer 1

a - b = 80 a + b = 180 a = 80 + b putting 80 + b in place of a 80 + b + b = 180 80 + 2b =180 2b = 180 - 80 2b = 100   b = 50