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m = 24/12
m = 2
b) 3z + 11 = -28
3z = -28-11
3z = -39
z = -39/3
z = -13
c)25 - 4y = 6y + 15
25 - 15 = 4y + 6y
10 = 10y
y = 10/10
y = 1
d) -4x - 15 = 1 - 8x
-4x + 8x = 15 + 1
4x = 16
x = 16/4
x = 4
e) 6/a + 2 = 4
2-4 = 6/a
-2 = 6/a
a = 6/-2
a = 3
<=> 1/2
3z+11 = -28
3z= -28-11
3z= -39
z= 13
25-4y = 6y=15
-4y-6y= 15-25
-10y=-10
y=1
-4x-15= 1-8x
-4x-8x=1=15
4x=16
x=4
6 per a + 2= 4
6+2=4a
8=4a
2=a