Answer:
x = $3,521
Explanation:
let the amount of money that she put towards a house be represented by the variable x
Hence,
total savings = amount put towards house + amount left
$40,000 = x + $36,479 (rearrange)
x + $36,479 = $40,000 (subtract $36,479 from both sides)
x = $40,000 - $36,479
x = $3,521