ratios are just fractions. So, you have
a = h
(a-23)/(h-7) = 3/4
now just solve for a,h and then a+h
Abby and Hakeem had the same number of CDs. After Abby gave away 23 Cds and Hakeem sold 7 Cds the ratio became 3:4. How many CDs did they all have together?
I can't figure out because ratios have never been something I was good at...
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