Jawabanmu

2014-02-19T14:24:40+07:00
1. 24m = 12
   m = 24 : 12
   m = 2
   m = { 2 }
2. 3z + 11 = -28
<=> 3z + 11 - 11 = -28 - 11
<=> 3z = -39    kedua ruas dibagi 3
<=> z = 13
2014-02-19T14:24:57+07:00
1) 24m = 12
m = 12/24= 1/2
HP = {1/2}

2) 3z + 11 = -28
3z= -28 -11
3z= -39
z=-39/3
z= -13
HP={-13}

3) 25 - 4y = 6y + 15
25-15=6y+4y
10=10y
y=10/10
y=1
HP={1}

4) -4x - 15 = 1 - 8x

-4x+8x=1+15
4x=16
x=16/4
x=4
HP={4}