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Chapter 2: Q7. (page 93)

Twelve decreased by twice a number equals -34. Write an equation for this situation and then find the number.

Short Answer

Expert verified

The equation of a given situation is 2x鈭�12=鈭�34.

The solution of the equation x=鈭�11.

Step by step solution

01

Step 1. Make the equation.

Twelve decreased by twice a number is -34.

Let the number be x .

The equation is2x鈭�12=鈭�34

02

Step 2. Isolate the variable.

2x鈭�12=鈭�342x=鈭�34+122x=鈭�22

03

Step 3. Find the value of x from the equation.

x=鈭�222x=鈭�11

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