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

Is the legacy of the civil war still apparent today? How?

Which statement below best describes Cincinnatus and Julius Caesar? A. Both men put the welfare of the Roman Republic above their own personal success and both

Solve the equation 8x-12=5+15

which tool would you use to measure the height of a cube of metal

IF T(n) =+3 what is the third term?

Is a ziggurat still used today?

What did the Sumerians use to sign their names? A. a signet ring B. stamps and ink pads C. a thumbprint D. a cylinder seal

AP US History question: Assess the relative influence of THREE of the following in the American decision to declare war on Germany in 1917. Germany naval policy

why are some organisms that consist of thousands of cells considered to be protists

what role did the freedmen's bureau play in reconstruction?