Calcule as seguintes expressões

11) -2x+4=-5
5+4=2x
9/2=x
4,5=x

12) 6x-1=9
6x=9+1
6x=10
x=10/6
x=1,66..

13) 5x+7=2x+13
5x-2x=13-7
3x=6
x=6/3
x=2

14) 4x-5=5x-1
1-5=5x-4x
-4=x

15) 2x+3=9-x
2x+x=9-3
3x=6
x=6/3
x=2

16) 4x+11=7x+1
11-1=7x-4x
10=3x
10/3=x
3,33…=x​