Geometry question?

Thanks to anyone who answers

enter image source here

2 Answers
Feb 18, 2018

#x = 75#

Explanation:

The diagram shows proportional triangles, indicated by the parallel FS and DY lines. Thus, the ratios of the sides are equal.

#50/42 = (x + 50)/(63 + 42)#

#(25/21) xx 105 = (x + 50)#

#x = (25/21) xx 105 - 50#

#x = 75#

Feb 18, 2018

#x=75# units

Explanation:

enter image source here
Given that #FS# // #DY#,
#=> DeltaFSJ and DeltaDYJ# are similar.
In two similar triangles, the ratios of the lengths of their corresponding sides are equal,
#=> (FJ)/(SJ)=(DJ)/(YJ)#,
#=> (x+50)/(63+42)=(50)/(42)#
#=> x+50=105xx(50)/(42)=125#
#=> x=75# units