1. m∠1=30 and m∠2=4x What is the value of x?
2. m∠3=5x and m∠4=75 What is the value of x?
3. m∠4=45 and m∠2=9x What is the value of x?

if m<1 = m<3 = 5x, m<2= 3x-60, and m<4= x, find the value of x​