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= 2a = 5 - 3
2a = 2
a = 2
2. m = 4
18 - 10 = -2m
8 = -2m
8/2 = 4
3. x = 10
1 + 9 = x
10 = x
2a+ 3= 5
2a= 5 - 3
2a= 2
a= 2/2
a= 1
No. 2
18= 10 - 2m
18 - 10= -2m
-2m= 18 - 10
-2m= 8
m= 8/-2
m= -4
No. 3
1= 9 + x
1 - 9= x
x= 1 - 9
x= -8