Question
Dawn has been using two bank accounts to save money for a car. The difference between account 1 and account 2 is $100. If she uses 3/8 of account 1 and 7/8 of account 2, Dawn will have a down payment of $2,000. Solve the system of equations to find the total amount of money Dawn has in each account.
A – B = 100
Three-eighthsA + Seven-eighthsB = 2,000
Dawn has $
in account 1 and $
in account 2.
A – B = 100
Three-eighthsA + Seven-eighthsB = 2,000
Dawn has $
in account 1 and $
in account 2.
Answers
GPT-4o mini
Let's define the variables for the amounts in each account:
- Let \( A \) be the amount in account 1.
- Let \( B \) be the amount in account 2.
We have the following system of equations:
1. \( A - B = 100 \)
2. \( \frac{3}{8}A + \frac{7}{8}B = 2000 \)
Now we can solve this system step-by-step.
### Step 1: Solve the first equation for \( A \):
From the first equation,
\[
A = B + 100
\]
### Step 2: Substitute \( A \) in the second equation:
We can substitute \( A \) in the second equation:
\[
\frac{3}{8}(B + 100) + \frac{7}{8}B = 2000
\]
### Step 3: Distribute and combine like terms:
Distributing the \( \frac{3}{8} \):
\[
\frac{3}{8}B + \frac{300}{8} + \frac{7}{8}B = 2000
\]
Combine the terms involving \( B \):
\[
\left(\frac{3}{8}B + \frac{7}{8}B\right) + \frac{300}{8} = 2000
\]
\[
\frac{10}{8}B + \frac{300}{8} = 2000
\]
This simplifies to:
\[
\frac{5}{4}B + \frac{300}{8} = 2000
\]
### Step 4: Multiply the entire equation by 8 to eliminate fractions:
Multiply by 8:
\[
10B + 300 = 16000
\]
### Step 5: Solve for \( B \):
Subtract 300 from both sides:
\[
10B = 15700
\]
Divide by 10:
\[
B = 1570
\]
### Step 6: Substitute back to find \( A \):
Now we can find \( A \) using the equation \( A = B + 100 \):
\[
A = 1570 + 100 = 1670
\]
### Summary of Results
Dawn has:
- \( A = 1670 \) in account 1
- \( B = 1570 \) in account 2
Thus, the final amounts are:
- Dawn has **$1670** in account 1 and **$1570** in account 2.
- Let \( A \) be the amount in account 1.
- Let \( B \) be the amount in account 2.
We have the following system of equations:
1. \( A - B = 100 \)
2. \( \frac{3}{8}A + \frac{7}{8}B = 2000 \)
Now we can solve this system step-by-step.
### Step 1: Solve the first equation for \( A \):
From the first equation,
\[
A = B + 100
\]
### Step 2: Substitute \( A \) in the second equation:
We can substitute \( A \) in the second equation:
\[
\frac{3}{8}(B + 100) + \frac{7}{8}B = 2000
\]
### Step 3: Distribute and combine like terms:
Distributing the \( \frac{3}{8} \):
\[
\frac{3}{8}B + \frac{300}{8} + \frac{7}{8}B = 2000
\]
Combine the terms involving \( B \):
\[
\left(\frac{3}{8}B + \frac{7}{8}B\right) + \frac{300}{8} = 2000
\]
\[
\frac{10}{8}B + \frac{300}{8} = 2000
\]
This simplifies to:
\[
\frac{5}{4}B + \frac{300}{8} = 2000
\]
### Step 4: Multiply the entire equation by 8 to eliminate fractions:
Multiply by 8:
\[
10B + 300 = 16000
\]
### Step 5: Solve for \( B \):
Subtract 300 from both sides:
\[
10B = 15700
\]
Divide by 10:
\[
B = 1570
\]
### Step 6: Substitute back to find \( A \):
Now we can find \( A \) using the equation \( A = B + 100 \):
\[
A = 1570 + 100 = 1670
\]
### Summary of Results
Dawn has:
- \( A = 1670 \) in account 1
- \( B = 1570 \) in account 2
Thus, the final amounts are:
- Dawn has **$1670** in account 1 and **$1570** in account 2.
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