What is the value of x in the proportion below 5/7 = x/21

(sin 42)/31. = sinx)/37

sinx = 37 (sin42)/31

= 37× 0.66/31 = 0.787

x= 51.9

other angle opposite to y = 180-51.9-42

= 180- 93.9 =86.1

so

sin42)/31 = sin 86.1)/y

0.021 = 0.997 /y

y= 0.997/0.021 =47.47

-22

times both sides by 2, times () by 8, add alile terms, move terms, add alike and caculate divide both sides by 3