Question 1086892
{{{A+B+H=36}}}
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{{{A=B-3}}}
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{{{B=A+3}}}
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{{{H=6+A}}}
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Substituting,
{{{A+(A+3)+(6+A)=36}}}
{{{3A+9=36}}}
{{{3A=27}}}
{{{A=9}}}
{{{B=9+3=12}}}
{{{H=6+9=15}}}