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She would have $7160.86 left over in cash here's why.....
she starts off with $8,322.65 and spends $830.98 on rent $8,322.65-$830.98= $7,491.67
then spends $210.36 on food and another $120.45 on gas
$7,491.67-$210.36= $7,281.31 - $120.45= $7,160.86 <---- Left over $
X-7=18
+7 to both side
X=25
1 hour and a half. Every half hour is a quarter. So 3 half hours = 1 hours and a half. Hope this helps!
