中一數學題題: solving equations(要做的過裎) 1. 3(y+4)=y 2. 2(p-1)=3p-4?

1. 3(y+4) = y
3y+3*4 = y
3y+12 = y
3y-y = -12
2y = -12
y = -12/2
y = -6

2. 2(p-1)=3p-4
2p-2 = 3p-4
-2+4 = 3p-2p
2 = p
p = 2