They will have same amount in 45 weeks.
Step-by-step explanation:
Given,
Starting amount of Nancy = $425
Per week saving = $25
Let,
x represent the number of weeks.
N(x) = 25x+425
Starting amount of Seamus = $875
Per week saving = $15
S(x) = 15x+875
For same amount;
N(x) = S(x)
[tex]25x+425=15x=875\\25x-15x=875-425\\10x=450[/tex]
Dividing both sides by 10
[tex]\frac{10x}{10}=\frac{450}{10}\\x=45[/tex]
They will have same amount in 45 weeks.
Keywords: function, division
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