maths
posted by sheila
mrs chan baked some cupcakes. She gave 1/6 of the cupcakes to her neighbour and 7/10 of this remaining cupcakes to
her sister. If she had 12 cupcakes left, how many cupcakes did she bake together?

Damon
n cupcskes
n/6 to neighbor , 5n/6 remain
(7/10)(5n/6) to sister or 7n/12 to sister
(3/10)(5n/6) remain or n/4 remain
so
n/4 =12
n =48
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