Question

I earn 770.98(R) every week. I have 385.49(R) since I spent the other half on toys. I want extra items on a game, but it's 1,541.72(R). How long will I have to wait until I save enough money for it? 385.49 + 770.98 < 1,541.72. (It's in Russian dollar so lemme translate) 385.49 = 5 US dollar) 770.98 = 10 US dollar) 1,541.72 = 20 US dollar)

Answer 1

1.5 weeks

Explanation:

Given

`Earnings = 770.98` weekly

`Amount\ Left = 385.49`

`Game\ Cost = 1541.72`

Required

Determine the time taken to save up

Represent the time with t

The relationship between the given parameters can be expressed as:

Amount + Earnings in t weeks = Game Cost

This gives:

`385.49 + 770.98t = 1541.72`

Collect Like Terms

`770.98t = 1541.72 - 385.49`

`770.98t = 1156.23`

Solve for t

`t = 1156.23/770.98`

`t = 1.49968870788`

`t = 1.5` Approximated