Question 907069

{{{-3P+7=5-(10P+3)}}}

{{{ -3P+7=5-10P-3 }}}

{{{-3P+7-7=5-10P-3-7}}}

{{{-3P=5-10P-10}}}

{{{-3P=-10P-5}}}

{{{-3P+10P=-10P+10P-5}}}

{{{-3P+10P=-5}}}

{{{7P=-5}}}

{{{P=-5/7}}}