Lets suppose

the number=x

the question can be written as:

10(x+14)=9(x)

expanding

10x+140=9x

shifting 10x

140=10x-9x

so

x=140

the number=x

the question can be written as:

10(x+14)=9(x)

expanding

10x+140=9x

shifting 10x

140=10x-9x

so

x=140