Question 167435
Let {{{x}}}= mystery number
Condition:
{{{4x-18=15+x}}}
{{{4x-x=15+18}}}
{{{3x=33}}} -----> {{{cross(3)x/cross(3)=cross(33)11/cross(3)}}}
{{{highlight(x=11)}}}, The Mystery Number
Check,
{{{4*11-18=15+11}}}
{{{44-18=26}}}
{{{26=26}}}
Thank you,
Jojo