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Anne bought a necklace for each of her three sisters he paid $7 for each necklace. Suppose she had $9 left. write and solve an equation to find how much money Anne had initially to spend on each sister.

Respuesta :

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. Anne has 3 sisters
. she buys each sister a necklace
. 1 necklace = $7
. she has $9 left after buying the necklaces

necklace=a
money had to spend per sister= b

3a + 9 = b×3

3×a + 9 = b×3
3×7 + 9 = b×3
21 + 9 = b×3
30 = b×3
30 ÷ 3 = b
10 = b

Anne initially had $10 to spend on each sister.

The equation that represent how much Anne had initially to spend is x - 21 = 9 and the money she had initially is 30 dollars.

How to use equation to find the amount Anne had initially to spend?

She bought a necklace for each of her three sisters. She paid $7 for each of the necklace. she had 9 dollars left after the expenditure.

Therefore,

let the money she had initially = x

Hence,

x - 7(3) = 9

x - 21 = 9

x = 21 + 9

x = 30

Therefore, the money she had initially to spend on each sister was 30 dollars.

learn more on equation here: https://brainly.com/question/900047

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