triangle ABC is congruent to triangle def. in triangle ABC,side AB measures 6, side BC measures 5x-21 and side CA measures 5. in triangle DEF side DE measures 6 side ER measures x-1 and side FD measures 5. what equation would help you to solve for the side length of BC and EF. please help

Question

triangle ABC is congruent to triangle def. in triangle ABC,side AB measures 6, side BC measures 5x-21 and side CA measures 5. in triangle DEF side DE measures 6 side ER measures x-1 and side FD measures 5. what equation would help you to solve for the side length of BC and EF.  please help

anonymous · Answer

please someone help

anonymous · Answer

as the triangles are congruent so their corresponding sides are equal 
now from analyzing the statement given AB=DE=6 ,CA=FD=5 and BC=EF 
BC=EF
5x-21=x-1
solve the equation

anonymous · Answer

okay so how do I solve it? im really confused right now

anonymous · Answer

don't freak out its easy 
5x-21=x-1
rearrange the equation 
5x-x=21-1
x=20/4 =5

anonymous · Answer

okay  thank you so much for your help!! that made it a lot simpler!