Can someone check my answers?
1. 3/c - 4/3c = 5/3c
2. -3t/t-4 - 2t+4/4-t = -2t-4/t-4
3. z/3z^2 + 4/7z = 19/21z
4. 5x/2x-6 + x+2/3-x = 4x-2/2x-6 or 2(2x-1)/2(x-3)
1. write it as 5/(3c)
2. I will assume it is
-3t/(t-4) - (2t+4)/(4-t)
= -3t/(t-4) + (2t+4)/(t-4)
= (-t+4)/(t-4)
3. write it as 19/(21z)
4. Again, I will assume you meant
5x/(2x-6) + (x+2)/(3-x)
= 5x/(2(x-3)) - (x+2)/(x-3)
= (5x - 2(x+2))/(2(x-3))
= (3x- 4)/(2(x-3))