What is the answer for the variable(s) in each question?

Question

1. 75+7x=2x

2.3n-1=5a-9

3.4-6p=2p-3

4.60c-54(c-2)=0

Answer 1

1.

75 + 7x = 2x

7x - 2x = -75

5x = -75

x = -15

2. You have two different variables but only one equation. Assuming you just made a typo, I'll just fix it:

3n - 1 = 5n - 9

3n - 5n = -9 + 1

-2n = -8

n = 4

3.

4 - 6p = 2p - 3

-6p - 2p = -4 -3

-8p = -7

p = 7/8

4.

60c - 54(c-2) = 0

60c - 54c - 108 = 0

60c = 108

c = 1.8

Answer 2

1. 75+7x=2x

75=2x-7x

75=-5x

-15=x

2. 3n-1=5n-9  Assuming the variable are the same on both sides

3n-1+9=5n

3n+8=5n

8=5n-3n

8=2n

4=n

3. 4-6p=2p-3

4+3-6p=2p

7-6p=2p

7=2p+6p

7=8p

7/8=p

4. 60c-54(c-2)=0

60c-54c+108=0

6c+108=0

6c=-180

c=-30

Answer 3

1. x = -8.3333333

i don't wanna do the other ones...