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Korolek [52]
2 years ago
14

You have $60 and your sister has $120. You are saving $14 per week and your sister is saving $10 per week. How long will it be b

efore you and your sister have the same amount of money? What amount would you have the same?
Mathematics
2 answers:
Ludmilka [50]2 years ago
3 0

it would take about 6 weeks and you would both have $130

Step-by-step explanation:

it would take you 5 weeks to reach $130 and your sister 1 week to reach $130.

Oxana [17]2 years ago
3 0

Answer:

15 weeks

$270

Step-by-step explanation:

Let y = total money saved

x = weeks

I am saving $14 every week, so I multiply x by 14

y = 14x

And I already have $60 to begin with

y = 14x + 60

My sister is saving $10 every week, so I multiply x by 10

y = 10x

And she already has $120 to begin with

y = 10x + 120

Now we just need to find a point where they are the same

14x + 60 = 10x + 120

Move like terms to one side, so subtract 10x from both sides

14x + 60 = 10x + 120

-10x         -10x

4x + 60 = 120

Subtract 60 from both sides

4x + 60 = 120

    - 60    - 60

4x = 60

Divide both sides by 4

4x/4 = 60/4

x = 15

Now plug in the new x into one of the original equations to find the money amount. We'll use sister's.

y = 10(15) + 120

y = 150 + 120

y = 270

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