Answer:
x=75
Step-by-step explanation:
∆FSJ~∆DYJ
so the sides are proportional
SJ/YJ=FJ/DJ
(63+42)/42=(x+50)/50
105/42 ×50=x+50
125-50=x
X=75
FD/DJ=SJ/YJ=FS/DY(BEING CORESSPONDING SIDE OF SIMILAR TRAINGLES)
TAKING FIRST AND SECOND RATIO
OR X/50=63/42
OR X*42=63*50
OR X=3150/42
OR X=75
