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-3z-7z=-30
-10z=-30
z=-30/-10
z=3
2.3m+4=22
3m=22-4
3m=18
m= 18:3= 6
3. 3t +4= 2(t +11)
3t+4=2t+22
3t-2t=22-4
-t=18
t=-18
4. 5(z-4)=3(8-z)
5z -20=24 - 3z
5z+3z=24+20
8z=44
z= 44:8
z=11/2
-7z - 3z = -30
- 10z = - 30
z =
z = 3
2. 3m + 4 = 22
3m = 22 - 4
3m = 18
m =
m = 6
3. 3t + 4 = 2 (t + 11)
3t + 4 = 2t + 22
3t - 2t = 22 - 4
t = 18
4. 5(z - 4) = 3 (8 - z)
6z - 20 = 24 - 3z
6z + 3z = 24 + 20
9z = 44
z =