Question

Janelle has $ 20 and is saving $ 6 per week. April has $ 150 and spending $ 4 per week , when will they both have the same amount of money ?
i know by trial and error i will get 13 weeks, but how do i solve it by algebra ? please

Answer 1

If w = weeks, I would use the equation: $20 + 6w = $150 - $4w. You can than solve this by finding w.

Answer 2

Suppose you have $120 saved up, but spend it at a rate of $8 per week. At what point do you have no money left?