Question

An electronic store sold 6% of the cell phones that were on sale. If only 21 cell phones were sold,

how many cell phones were not sold? Write an equation to solve.

Select the correct choice below and fill in the answer box to complete your choice.

(Type a whole number.)

O A. 21x=0.06; x = 0.06=21; x =

OB. 0.06x = 21; x = 21 -0.06; X=

OC. X=0.06 = 21; x = 21 x 0.06; X=

OD. X-(21 -0.06) = 21; x = 21+ (21 -0.06); x =

There were

cell phones not sold.

(Type a whole number.)

Answer 1

The answer is below

Explanation:

Let x represent the number of phones that were on sale, given that 6% of the cell phones that were on sale, therefore:

number of cell phones sold = 6% of x = 0.06 × x = 0.06x

21 phones were sold, hence:

0.06x = 21

x = 21/0.06

x = 350 phones

This means that 350 cell phones were on sale.

Number of cell phones not sold = total number of cell phones that were on sale - number of cell phones sold

Number of cell phones not sold = 350 - 21

Number of cell phones not sold = 329