Question

31) the sum of two numbers is 45. one of the two numbers is twice the others. what are he numbers.
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Answer 1

Step-by-step explanation:

x+y=45 eq1

x=2y

x-2y=0 eq2

eq2-eq1

x+y=45

-x+2y=0

3y=45

y=45/3

y=15

put value in eq2

x-2(15)=0

x-30=0

x=30

Answer 2

Answer:

let one of the number be x.

other number=twice of first one.

                      =2*x=2x

ATQ,

first number+second number=45

x+2x=45

3x=45

x=45/3

x=15

first number=x=15

second number=2x=30

Step-by-step explanation:

HOPE THIS WILL HELP YOU:)