document.write( "Question 1091400: The price of a packet of salt goes up to 9 cents.The old price is four-fifths of the new price.Find the old and new prices. [Hint:let the old price be n cents.So the new price is n+9 cents \n" ); document.write( "
Algebra.Com's Answer #705790 by addingup(3677) You can put this solution on YOUR website! so you are saying that the old price was 4/5 of the new price, in other words, 4/5n. Correct? \n" ); document.write( "And the new price is 4/5n+9 No? \n" ); document.write( "So isolate the variable on the left side by dividing both sides by 4/5: \n" ); document.write( "4/5*5/4n = 5/4*9 \n" ); document.write( "on the left 4/5 and 5/4 cancel each other out and you end up with: \n" ); document.write( "n = 5/4*9 = (5*9)/4 = 45/4 = 11 1/4 or 11.25 \n" ); document.write( " |