Variable
variables are any letters you use, such as in 3x, x is your variable. It holds an unknown value
1/2, 3/4, 9/10, 4/2
I don't think this was a middle school question but whatevs
The answers are
1. 
2. 
3. 
What are fractions?
Any number of equal parts is represented by a fraction, which also represents a portion of a whole. In ordinary English, a fraction refers to the number of parts of a specific size.
We are given,
1. 
As the denominator of both fractions are same we add the numerator
We get,

2. 
As the denominator of both the fractions are same we subtract the value in the numerator we get,


3. 
We first simplify the first term of the equation,

Now as the denominator is not same we use cross multiplication to perform the operation

On further simplifying we get,

Hence the answers are
1. 1
2. 
3. 
To refer more about the fraction please refer
brainly.com/question/17220365
#SPJ13
Answer:

Step-by-step explanation:
There can be two values of x.
The range is largest no. - smallest no.
Range = 64
Let x be the smallest no.
largest no. from the list is 37
37 - x = 64
-x = 64 - 37
x = -27
Let x be the largest no.
smallest no. from the list is 3
x - 3 = 64
x = 64 + 3
x = 67
Answer:
x = 100
Step-by-step explanation:
350x + 22,000 = 410x + 16,000
-350x -350x
22,000 = 60x + 16,000
-16,000 -16,000
6,000 = 60x
6,000 / 60
x = 100