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2 votes
The sum of 2 numbers is 21 the second number is six times the first

2 Answers

2 votes

Explanation:

We can create two equations and solve the system of equations to find both the numbers. Let's represent the numbers as a and b.

We can create two equations:

a+b=21a+b=21

b=6ab=6a

We can now substitute the value of b (6a) into the first equation.

a + (6a) = 21a+(6a)=21

Combine like terms:

7a=217a=21

Divide both sides by 7:

a=3a=3

Now we know the first number is 3. We can plug this value into one of the equations to find b. Let's plug it into b=6ab=6a .

b=6⋅3

b=18

So our numbers are 3 and 18.

Hope this helped!

User Bart Read
by
3.9k points
4 votes

Answer:


\huge\boxed{\text{Numbers: 3, 18}}

Explanation:

We can create two equations and solve the system of equations to find both the numbers. Let's represent the numbers as a and b.

We can create two equations:


a+b=21


b=6a

We can now substitute the value of b (6a) into the first equation.


a + (6a) = 21

Combine like terms:


7a=21

Divide both sides by 7:


a=3

Now we know the first number is 3. We can plug this value into one of the equations to find b. Let's plug it into
b=6a.


b = 6 \cdot 3\\\\b = 18

So our numbers are 3 and 18.

Hope this helped!

User Baron Legendre
by
4.5k points