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2a= 5-3
2a=2
a=2/2
a=1
2. 9-3r = 6
-3r = 6-9
-3r = -3
r = -3/-3
r = 1
4. 18 = 10-2m
18-10 = -2m
8 = -2m
m = 8/-2
m = -4 dikali (-)
m = 4
5. 1 = 9+x
1-9 = x
-8 = x
x = -8 dikali (-)
x = 8