You have $80 and your sister has $110. You are saving $8 per week and your sister is saving $5 per week. Write and solve an equation to find out how many weeks it will take for you and your sister to have the same amount of money saved.

1 answer

Let's assume it will take x weeks for you and your sister to have the same amount of money saved.

After x weeks, you will have saved $8 * x.
After x weeks, your sister will have saved $5 * x.

We can set up the equation: $80 + $8x = $110 + $5x.

Simplifying this equation:
$8x - $5x = $110 - $80
$3x = $30

Dividing both sides of the equation by 3:
x = $30 / $3
x = 10

Therefore, it will take 10 weeks for you and your sister to have the same amount of money saved.