4. Solve each equation for the variable. Show your work. (8 points: 2 points each with work shown) A.10 + x = 23 (I have the answer for A, however i am having difficulties with the other problems.)

C.–7.4x = –22.2

B.12.7 = x – 3.8

D. -3/5x = 6

Thank you for your help. :)

Step-by-step explanation:

A 10 + x = 23

x = 23 - 10

x = 13

B - 7.4x = - 22.2

x = - 22.2 / - 7.4

x = 3

C 12.7 = x - 3.8

12.7 + 3.8 = x

16.5 = x

D - 3/5x = 6

-0.6x = 6

x = 6/- 0.6

x = - 10

(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