adbradley205 adbradley205

15-05-2020
Mathematics

contestada

The sum of two numbers is 30 and their difference is 12. Find the two numbers.

Respuesta :

15-05-2020

Answer:

let the two numbers are x & y

x+y=30...eq(1) &x-y=12....eq(2)

x=30-y then put in the eq(2)

30-y-y=12

30-2y=12

-2y=12-30

-2y= -18

y=9 then we put this answer in to eq(1)

so,x+y=30

x+9=30

x=30-9

x=21

so, the two numbers are (21,9)

Answer Link

Otras preguntas

how many times wider is the sun than the earth

Mindy had 3 3/4 pies. Then her family ate 2 1/3. How much was left?

One goal of both the United States and the USSR during the arms race was to....

Why is euthanasia such a controversial issue?

How do the changing seasons impact Persephone and Demeter's,relationship

A snowboarder descends a 1200-foot hill in 3 minutes. What is the mean change in elevation per minute?

expanded form for 24.76

the school has budgeted $2000 for an end- of year party at the local park.the cost to rent the park is $150.how much can the student council spend per student o

Marcus is 5 7/24 feet tall Ben is 5 5/16 feet tall which of the two boys is taller? Justify your answer

At president Lincoln's inauguration in 1861, the newspaper headlines. stated there were about 30,000 people in attendance. if the newspaper rounded to the neare