Answer:
If two people have answered, you chose the one you want to give brainliest, and give them a crown on their answer.
Step-by-step explanation:

You are taking two times a number, which is defined as x. That is equivalent to 2x. Then, you are adding three more to that product.
Answer:
Binary number is a number expressed in the base-2 numeral system or binary numeral system, a method of mathematical expression which uses only two symbols: typically "0" (zero) and "1" (one). The base-2 numeral system is a positional notation with a radix of 2.
Answer:
First number --> x
Second number --> y
x + y = 14 --> x = 14 - y
x - y = 4
so
14 - y - y = 4
14 - 2y = 4
2y = 10
y = 5
so
x = 14 -5
x = 9
Hello there.
Question: <span>What is the missing number in the number sentence ?
Answer: It would be 4.
Both sides should be equal therefore the number you need is 4.
</span>Hope This Helps You!
<span>Good Luck Studying ^-^</span>