Which situation cannot be represented by this equation?

3x+4=19

clear check

penny is selling candles for $3 each at a fund-raiser.

if she starts selling with $4 to her make change, how many candles, x, will she have to sell to end up with $19?

penny is selling candles for $4 each at a fund-raiser.

if she starts selling with $3 to her make change, how many candles, x, will she have to sell to end up with $19?

penny has already sold 3 candles at a fund-raiser.

if she started selling with $4 to her make change, what is the price, x, of each candle, if she ends up with $19