duhrachel duhrachel

08-09-2015
Mathematics

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barry has 18 more marbles than heidi.if barry has 92 marbles,write and solve an equation to determine the number of marbles heidi has.

Respuesta :

08-09-2015

n= Heidi's marbles
92 - n =18 (Barry's 92 marbles - whatever Heidi has = 18 marbles difference)

92 -n +n = 18 +n (I added n to each side)
92 = 18+n
92 -18 = 18-18 + n (I subtracted 18 from both sides)
74 = n Heidi has 74 marbles

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