dylandouglas5396 dylandouglas5396

03-11-2017
Mathematics

contestada

"the sum of the digits of a two-digit number is 13. reversing the digits produces a number that is 9 less than the original number. what is the original number?"

Respuesta :

tynollette tynollette

03-11-2017

suppose the one's digit is x, the ten's digit is y. the original number is 10y+x, the reversed number is 10x+y

x+y=13
(10x+y)=(10y+x)-9 =>9y-9x=9 =>y-x=1
Add the two equation to solve: 2y=14 =>y=7
x=13-7=6
the original number is 76.

Answer Link

Otras preguntas

The point (-7,1) when reflected across the origin maps onto

An ordinary deck of playing cards contains 52 cards, 26 red and 26 black. If a card is dealt to each of 2 players,. Find in how many different ways this can be

Who has ceased named as is his heir

PLZ HELP QUICK WILL GIVE BRANLIEST Darryl wants to improve the food at his restaurant, Downtown Deli, by purchasing some new items to sell. He wants to save as

What is the nth term of the following sequence……… 8, 3, -2, -7………..explain clearly aswell

A microwave was bought for 15,000 and sold for 14,000.What is the percentage loss?

Answer this please thanks

1/3x+4=10 What is x?

8. A goldsmith has 130 grams of a gold alloy (a mixture of gold and one or more other metals) containing 85% pure gold. How much pure gold must be added to this

On May 1, 2017, Pronghorn Company issued 2,500 $1,000 bonds at 102. Each bond was issued with one detachable stock warrant. Shortly after issuance, the bonds we