solve for c A= -3(a + b - 1/3c)

Assuming you mean

A= -3(a + b - (1/3)c)
when parentheses are used correctly.

Divide both sides by -3, and swap sides
a+b-(1/3)c = -A/3
-(1/3)c = -A/3-a-b

Divide both sides by -(1/3)
c = A+3a+3b

thank u

You're welcome!

To solve for c in the equation A = -3(a + b - 1/3c), we need to isolate the variable c.

1. Distribute the -3 to the terms inside the parentheses:
A = -3a - 3b + c

2. Move the -3a and -3b terms to the right side of the equation by adding them to both sides:
A + 3a + 3b = c

3. Combine like terms on the left side:
3a + 3b + A = c

Therefore, the solution for c is c = 3a + 3b + A.