For determining proportional ratios, you have to multiply both the denominator and the numerator by the same number
Eg. 14/4 is proportional to 7/2 while 22/6 is not proportional to 7/2.
Answer:
a=-1/2b+c+-7/2
a= -1/2b+1/6c+-13/3
a= -1/2b+-1/2c-5
I really hope that my answer is right
Here is my answer:
a. 9x + 1
b. 9x + 57
c. 63x - 42
d. 63x - 6
4b-14 because you distribute the negative sign to the 6-b