Question

Tracy is saving to buy a new guitar that costs $253.77 (including tax). Tracy has saved $136.27, and she can save $23.50 each week.

Which equation could you use to find how long it will take to save for the guitar?

$23.50w = $253.77
$253.77 - w = $136.27 + $23.50
$253.77 + $136.27 = $23.50w
$136.27 + $23.50w = $253.77

Answer 1

She will earn $23.5*w in w weeks. We form equation

Total Cost = Current savings + future savings
253.77 = 136.27 + 23.5w
253.77-136.27 = 136.27 + 23.5w - 136.27
117.5 = 23.5w
117.5/23.5 = 23.5w/23.5
5 = w
w = 5 weeks

Answer 2

ok, thank you.

Answer 3

You welcome