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The sum of three consecutive multiples of 11 is 1023. Find them.

Sagot :

Let's determine the three consecutive multiples of 11 whose sum is 1023.

1. Let's denote these three multiples of 11 as:
- The first multiple: [tex]\(11n\)[/tex]
- The second multiple: [tex]\(11(n+1)\)[/tex]
- The third multiple: [tex]\(11(n+2)\)[/tex]

2. To find their sum, we can write the equation:
[tex]\[ 11n + 11(n+1) + 11(n+2) = 1023 \][/tex]

3. Simplify the equation by factoring out 11:
[tex]\[ 11n + 11n + 11 + 11n + 22 = 1023 \][/tex]
[tex]\[ 33n + 33 = 1023 \][/tex]

4. Solve for [tex]\(n\)[/tex] by isolating it on one side of the equation:
[tex]\[ 33n + 33 = 1023 \][/tex]
[tex]\[ 33n = 1023 - 33 \][/tex]
[tex]\[ 33n = 990 \][/tex]
[tex]\[ n = \frac{990}{33} \][/tex]
[tex]\[ n = 30 \][/tex]

5. Now that we have [tex]\(n = 30\)[/tex], we can find the actual multiples:
- The first multiple: [tex]\(11n = 11 \times 30 = 330\)[/tex]
- The second multiple: [tex]\(11(n+1) = 11 \times 31 = 341\)[/tex]
- The third multiple: [tex]\(11(n+2) = 11 \times 32 = 352\)[/tex]

Thus, the three consecutive multiples of 11 whose sum is 1023 are [tex]\(330\)[/tex], [tex]\(341\)[/tex], and [tex]\(352\)[/tex].