- 100 – (3x + 12)
- (100 - 12x) - 3x
- 100 - (x + x + x) - 3x)

<h3>

**Further explanation**</h3>

<u>**Given:**</u>

Huang buys

- 3 shirts that each cost the same amount,
- a pair of pants that cost $12,

and he pays with a $100 bill.

<u>**Question:**</u>

Which expression represents the amount of change Huang should receive?

<u>**The Process:**</u>

We try to solve a word problem about **the single variable equation**.

- Let the price of the shirt be x (in USD) per piece because the price is unknown.
- Huang buys 3 shirts at the same unit price. The total price of the shirt formed an equation
- Also, he buys a pair of pants that cost $12.
- Next, he pays for the purchase with a $100 bill at the cashier.

Calculate and prepare a total purchases.

**Total purchases = shirts costs + pants costs **

**Total purchases is **

Let us determine the expression that represents the amount of change Huang should receive.

**The amount of change is total payments subtracted by total purchases**.

Thus the three expressions of the amount of change are as follows:

<u>**Notes:**</u>

<h3>Learn more</h3>

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**Keywords:** Huang buys 3 shirts, that each cost the same amount, a pair of pants that cost $12, and he pays with a $100 bill, an expression represents the amount of change, select three options, a word problem, the single variable equation