given (a,b,c,d,e) are all integers and all of them are greater than 10, find the number of solution sets of (a+b+c+d+e)=83

To solve the equation \(a + b + c + d + e = 83\), where \(a\), \(b\), \(c\), \(d\), and \(e\) are integers greater than 10, we need to transform the equation into a simpler form.

### Step 1: Change of Variables
Let:
\[
a' = a - 11, \quad b' = b - 11, \quad c' = c - 11, \quad d' = d - 11, \quad e' = e - 11
\]
where \(a', b', c', d', e' \geq 0\). This transformation shifts the variables so that they are non-negative integers.

Thus, the original equation becomes:
\[
(a' + 11) + (b' + 11) + (c' + 11) + (d' + 11) + (e' + 11) = 83
\]
Simplifying:
\[
a' + b' + c' + d' + e' = 28
\]
Now, we need to count the number of non-negative integer solutions to the equation \(a' + b' + c' + d' + e' = 28\).

### Step 2: Stars and Bars
The number of non-negative integer solutions to an equation of the form \(x_1 + x_2 + \dots + x_k = n\) is given by the stars and bars formula:
\[
\text{Number of solutions} = \binom{n + k - 1}{k - 1}
\]
In this case, \(n = 28\) and \(k = 5\) (since there are 5 variables \(a', b', c', d', e'\)). Thus, the number of solutions is:
\[
\binom{28 + 5 - 1}{5 - 1} = \binom{32}{4}
\]

### Step 3: Calculate \(\binom{32}{4}\)
\[
\binom{32}{4} = \frac{32 \times 31 \times 30 \times 29}{4 \times 3 \times 2 \times 1} = \frac{32 \times 31 \times 30 \times 29}{24}
\]
\[
\binom{32}{4} = \frac{863040}{24} = 35960
\]

### Final Answer
Thus, the number of solution sets for the equation \(a + b + c + d + e = 83\) is **35,960**.

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Would you like more details on any of the steps or calculations?

Here are some related questions:
1. How does the stars and bars method work in combinatorics?
2. What is the general formula for counting non-negative integer solutions in an equation?
3. Can we apply this method to equations with different variable restrictions?
4. What if one of the variables had to be at least 20 instead of 10?
5. How does this method apply if we are working with modular arithmetic?

**Tip:** When solving integer equations with constraints like \(x_i \geq k\), a variable shift can simplify the problem into one with non-negative integers.

Given (a, b, c, d, e) are all integers and all of them are greater than 10, find the number of solution sets of (a + b + c + d + e) = 83.

Explore how to find the number of solutions for the equation a + b + c + d + e = 83, where each variable is an integer greater than 10. This solution uses combinatorics concepts like the stars and bars theorem and binomial coefficients, suitable for advanced high school students.

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