Sara's paychek: $2700 <span>Aliyah’s paycheck is $700 more than one half of Sara’s: $2700/2+$700 Aliyah's paychek: $2050 </span><span>If Aliyah’s paycheck doubles, she would be making $650 more per paycheck than John: $2050*2-650$ John make $3450 per paychek. </span>