Question 337498
{{{PQS+SQR=90}}}
{{{4+7a+9+4a=90}}}
{{{11a+13=90}}}
{{{11a=77}}}
{{{a=7}}}
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.
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{{{PQS=4+7a=4+49=53}}}degrees
{{{SQR=9+4a=9+28=37}}}degrees