a b c d-———390————|—-x—-|—y—|—z—-|
x = y + 10y = z + 10 —→ z = y – 10x + y + z = 390
y + 10 + y + y -10 = 3903y = 390
x = 140y = 130z = 120
AB = 140, BC = 130, CD =120
a b c d-———390————|—-x—-|—y—|—z—-|
x = y + 10y = z + 10 —→ z = y – 10x + y + z = 390
y + 10 + y + y -10 = 3903y = 390
x = 140y = 130z = 120
AB = 140, BC = 130, CD =120