did Slave Codes prohibited slaves from meeting in large numbers, own weapons, leave plantations, and read or write ?

Treatment was generally characterized by brutality, degradation, and inhumanity. Whippings, executions, and rapes were commonplace, and slaves were usually denied educational opportunities, such as learning how to read or write. Medical care was often provided to slaves by the slaveholder’s family or fellow slaves who had gleaned medical knowledge via ancestral folk remedies and/or experiences during their time in captivity. After well-known rebellions, such as that by Nat Turner in 1831, some states even prohibited slaves from holding religious gatherings due to the fear that such meetings would facilitate communication and possibly lead to insurrection or escape.

some american cities felt workers were being oppressed by business monopolies

the perimeter of a triangle is 69 cm. side a is 5 cm shorter than side b. side c is twice as long as side a. find the length of each side. i need to know how to do it in 2 equations.  

equations:

a = b-5

c = 2a

a + b + c = 69