1. 12+3a=5+2a 2. 3(x+1)=2(x=4) 3. 3p+5=p 4. 7q=5q-12

1. a = -7
2. 3x+3 = 2x+8
x = 5
3. 2p = -5
p = -5/2
4. 2q=-12
q=-6