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Two consecutive integers add up to be 391. what are the two integers

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User Abdollah
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1 Answer

3 votes

Answer:

Smaller integer = 195

Larger integer = 196

Explanation:

We can find the two integers using a system of equations, where

  • x represents the smaller integer,
  • and y represents the larger integer.

First equation:

Since the sum of the two integers is 391, our first equation is given by:

x + y = 391

Second equation:

We know that for any two consecutive integers, the difference is always 1 when the smaller integer is subtracted from the larger (e.g., 2 - 1 = 1, 100 - 99 = 1, etc.).

Thus, our second equation:

y - x = 1

For ease when solving, we can write it as:

-x + y = 1

Method to solve: Elimination:

Solving for y:

The two equations are arranged in a way that will allow us to solve for y and eliminate the xs when adding since x - x = 0:

x + y = 391

+

-x + y = 1

----------------------------------------------------------------------------------------------------------(x - x) + (y + y) = (391 + 1)

(2y = 392) / 2

y = 196

Thus, y = 196.

Solving for x:

Now we can solve for x by plugging in 196 for y in the first equation:

(x + 196 = 391) - 196

x = 195

Thus, x = 195.

answered
User Jordan Grant
by
9.0k points

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