Ma poate ajuta cineva?

a) 23+5x=2x+74
5x-2x=74-23
3x=51
x=51:3=17
b) 32+6x=11x-113
6x+11x=113+32
17x=145
x=8,52
c)8+13x=2x+41
13x-2x=41-8
11x=33
x=3