x -13= 48
x= 48+13
x=61
x+21= -13
x= -13 - 21
x= -34
6 1/2+y= 2 1/3
3,5-a= -7,5
-a= -7,5 - 3,5
-a = -11
6w= 18
6w= 18\:6
w=3
1/4t= 5\:1\4t
t= 20
c/11= 3
6a-3= 39
6a = 39 +3
6a= 42
a= 7
5x+4= 24
5x = 24 -4
5x = 20
6-3x= 1
-3x = 1- 6
-3x = -5
x = 5\3
4-2x= 18
-2x = 18 -4
-2x = 14
x = -7
-3x-4= 12
-3x = 12 +4
-3x = 16
x = - 5,3