Question 1139455
p original price


First price reduction:  {{{p-0.2p}}}


Second price reduction:  {{{(p-0.2p)-0.1(p-0.2p)}}}



The price is now 1800 whatever the money units, after these two reductions.
{{{(p-0.2p)-0.1(p-0.2p)=1800}}}
.
Simplify and solve.