M S. answered 06/06/18
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Say Sandi earned S dollas. Hence Garth earned S+25 dollars.
Together they earned 425 dollars.
i.e. S+S+25=425
2S+25=425
2S=425-25=400
S=400/2=200
S+25=225
Sandi earned $200 and Garth earned $225.