Question

Can you help me please

Answer 1

When a and b are parallel.

The sum of supplementary angles is180º

m ∠ b + m ∠ a = 180º

(4x-5)+ (13x -2)= 180º

17 x -7 = 180ª

17 x = 180 +7

x= 187/ 17

x = 11