You can
put this solution on YOUR website!10+x=18
subtract 10 from both sides (example)
10-10+x=18-10
now subtract 10 and 10 will =0
10-10=0 it will stay as x
then the other side subtract 10 from 18
x=10-18=8
which will equal to 8
x=8
and theres your answer........