Answer:
y-5x-13 (lmk if you want me to explain)
Step-by-step explanation:
Answer:
4)x= g-c
5)x =u+k
6)x = g-c
7)
8)
9)
10)
11)
12)
13)a= d -r + c
14)
Step-by-step explanation:
4) g= c+x
x= g-c
5) u=x-k
x =u+k
6)g = c+x
x = g-c
7) 
8) g=xc

9) 12am = 4

10)-3x+2c = -3
2c = -3 +3x
2c +3 = 3x

11) am= n+p

12)
13)a-c = d-r
a= d -r + c
14)xm= np

6 (or B is you prefer) is the right answer
Yes it is equivalent.Good luck
12 = 3x - 15
12 + 15 = 3x
27 = 3x
27/3 = x
9 = x
x = 9