Question

The sum of two numbers is 28. If one of the numbers is thrice the other, find the numbers.​

Answer 1

Answer:

21

Step-by-step explanation:

Let the number be x,y

Sum x+y=28

One number thrice of other

x=3x

x-3x=0

x+y=28 to make similar multiply by to in 1st equation

3x+3y=84

x-3x=0

4x=84

x=21

x+y=28

21+y=28

y=28–21=7

Verification

x+y=28

21+7=28

28=28

L.H.S=R.H.S

Ans The numbers 7 and 21

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Answer 2

Step-by-step explanation:

Let one number be x

then the other number will be thrice of x =3x

given the sum of numbers is 28

therefore the equation formed is

x+3x=28

4x=28

x=28/4

x=7

now 3x =3×7

21

ans = the numbers are 7 and 21