Question

PLEASE HELP ME W/ MATH ASAP!!

Answer 1

due to similarity of triangles TVW and TSU:

TV/TS=TW/TU
14/20=21/(x+4)
from this equation we get x=26

Answer 2

use similarity property:

14 / (14+6) = 21 / (21 + (x+4))

14/20 = 21/(x+25) cross multiplication property

14*(x+25) = 20*21

14x + 350 = 420

14x = 70

x = 70/14 = 5.