david: 12g=270
her: 20g=330
david buys 5 gifts he will have 210 dollars left in his account ( 12x5= 60 & 270 - 60 = 210)
if kristin buys 6 gifts she will have 210 dollars left ( 20x6= 120 & 330-120= 210)
Answer:
12 gifts
Explanation:
set the equation to 270-15x=330-20x
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