Question 1114870
p, plant flowers
b, baby sit
c, clean house


{{{system(p+b+c=20,b=3c,p=b-1)}}}



Rewrite the first equation all in terms of b.

{{{(b-1)+b+b/3=20}}}


{{{b-1+b+b/3=20}}}
{{{2b+b/3=21}}}
{{{6b+b=63}}}
{{{7b=63}}}
{{{highlight(b=9)}}}------hours baby sitting


{{{highlight(8)}}}------plant flowers


{{{highlight(3)}}}------cleaning house