SOLUTION: Justin has already saved $100 and wants to buy a playstation 2 for $129 about four weeks from now. To find how much he should save each week between now and then, he wrote 100+4x=1

Question 158945: Justin has already saved $100 and wants to buy a playstation 2 for $129 about four weeks from now. To find how much he should save each week between now and then, he wrote 100+4x=139.99. Explain this equation.
Answer by jojo14344(1513) (Show Source): You can put this solution on YOUR website!
-------------> basic eqn
= savings he need to have per week in $$$$$
= # of weeks to do it
= prior savings he got
= total savings he'll get in 4 weeks
Continuing the above eqn,

------>
, THE SAVINGS HE NEED TO HAVE EVERY WEEK in 4 WEEKS To HAVE $139.99 (I guess $129 + tax).
Thank you,
Jojo
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