Read the scenario below and solve for the unknown value. Enter your exact numerical answer… — Armed Services Vocational Aptitude Battery (ASVAB)

Read the scenario below and solve for the unknown value. Enter your exact numerical answer in the blank provided.

Answer:A mechanic orders a set of spark plugs that cost

8 each, plus a flat shipping fee of

12. If the total charge is $60, the mechanic ordered 【6】 spark plugs.

By setting up the equation

8x + 12 = 60

, we can isolate

x

. Subtracting the constant

12

from both sides gives

8x = 48

. Dividing by

8

yields

x = 6

. Therefore,

6

spark plugs were ordered.

Set up a linear equation to represent the word problem.

8x + 12 = 60

Let

x

be the number of spark plugs. Multiplying the cost per plug (

8) by

and adding the flat shipping fee (

12) equals the total charge ($60).

Subtract 12 from both sides of the equation.

8x = 48

To begin isolating the variable

x

, the constant term must be removed from the left side of the equation.

Divide both sides by 8.

x = 6

To completely isolate

x

, divide by its coefficient. This reveals the number of spark plugs ordered.

Solving one-variable linear equations from a real-world scenario.

Question