Let's find the value of c given that -2 is the solution of the equation 2x + 1 - 3c = 2c + 3x - 7.

Substituting -2 for x in the equation, we get

2(-2) + 1 - 3c = 2c + 3(-2) - 7

-4 + 1 - 3c = 2c - 6 - 7.

Combining like terms, we get:

-3 - 3c = 2c - 13.

Adding 3c to both sides, we get

-3 = 5c - 13.

10 = 5c,

c = 10/5 = 2.

So, the value of c is 2