The sum of twice a number and seven is 13. Find the number.
1 answer:
Answer:
<h2>The answer is 3</h2>Step-by-step explanation:
Let the number be x
The statement
twice a number is written as
2x
The sum of twice a number and seven is written as
2x + 7
The result is 13
So we have
2x + 7 = 13
Subtract 7 from both sides
That's
2x + 7 - 7 = 13 - 7
2x = 6
Divide both sides by 2
That's
We have the final answer as
<h2>x = 3</h2>Hope this helps you
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Answer:
Sam's description = , Kim's description =
Step-by-step explanation:
Given:
Kim and Sam were each given the same pair of numbers.
Sam's description of the two numbers was:
The larger number is 3 more than three times the smaller number.
Kim's description of the two numbers was:
Five times the smaller number decreased by 7 is the larger number.
Question asked:
Which equation represents the situation?
<u>Solution:</u>
Let smaller number =
According to Sam's description of the two numbers, the equation will be:-
Larger number = 3 more than three times the smaller number
=
According to Kim's description of the two numbers was, the equation will be:-
Larger number = Five times decreased by 7
=
By equating both equation:-
Smaller number = = 5
Larger number =
Therefore, equations represents the situation are and