Question

Quien me la puede resolver?
9x-10=15+4x

Answer 1

9x-10=15+4x
9x-4x=15+10
5x=25
x=25/5
x=5

Answer 2

9x-10= 15+4x
9x-4x= 15+10
5x= 25
x= $\frac{25}{5}$
x= 5