Solved on Dec 07, 2023

Find the equation for the problem: When 296 is decreased by 11x11x, the result is 21. Solve for xx and check two answers.

STEP 1

Assumptions
1. The initial number is 296.
2. The number is decreased by 11 times an unknown number, which we will call x x .
3. The result after decreasing is 21.

STEP 2

We need to translate the word problem into an equation. The phrase "decreased by 11 times a number" means we subtract 11 times the unknown number from 296.
29611x=21296 - 11x = 21

STEP 3

To solve for x x , we first isolate the term containing x x by subtracting 296 from both sides of the equation.
29611x296=21296296 - 11x - 296 = 21 - 296

STEP 4

Simplify both sides of the equation.
11x=275-11x = -275

STEP 5

Now, we divide both sides by -11 to solve for x x .
11x11=27511\frac{-11x}{-11} = \frac{-275}{-11}

STEP 6

Calculate the value of x x .
x=25x = 25

STEP 7

To check the solution, we substitute x=25 x = 25 back into the original equation to see if the result is 21.
29611×25=21296 - 11 \times 25 = 21

STEP 8

Calculate the left side of the equation.
29611×25=296275296 - 11 \times 25 = 296 - 275

STEP 9

Simplify the expression.
296275=21296 - 275 = 21

STEP 10

Since the left side equals the right side (21 = 21), our solution x=25 x = 25 is correct.
The equation for the word problem is 29611x=21 296 - 11x = 21 , and the solution for x x is 25.

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