Question

Yuri is shopping for new workout clothes. He picks up a shirt for $12.50 and two pairs of shorts for $14.75 each. His total, with tax, is $44.31. Which equation will help him determine the tax rate, x?

Answer 1

The equation that can be used to determine the tax rate, x is ;44.31 = 42 + (x% of 42) where x = 5.5%

How to write equation

• Cost of a shirt = $12.50
• Cost of each shorts = $14.75

• Cost of two shorts = 2 × $14.75

= $29.5

• Total cost = $12.50 + $29.5

= $42

• Tax rate = x%

• Total amount paid = $44.31

Total = total cost + x% of total cost

44.31 = 42 + (x% of 42)

44.31 = 42 + 42x/100

44.31 - 42 = 42x/100

2.31 = 42x / 100

x = 2.31 ÷ 42/100

= 2.31 × 100 /42

= 231/42

= 5.5%

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