tolong dibantu ya.. soalnya tentang garis lurus..

hope it help...
mudah mudahan mbantu...

Besar ∠ABC = ∠D, maka 
3x - 48 = x + 22
2x = 70 
x = 35

Besar ∠ABC = 57°
∠ABC + ∠BCF = 180°
Maka,
∠BCF = 180 - 57 = 123°