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Alex777 [14]
3 years ago
11

The fifth graders are planning a pizza party. Each fifth grader will eat two slices of pizza with a favorite topping. Each fifth

grader selects a favorite topping. One-half of the students want pepperoni. One-fourth of the students want extra cheese. One-eighth of the students want sausage. Four students want mushrooms. How many students select a favorite topping for their pizza slice.
Mathematics
1 answer:
dezoksy [38]3 years ago
8 0
There are 32 students that select a favorite topping.

Let x be the total number of students.
1/2 of the students, or 1/2x, choose pepperoni.
1/4 of the students, or 1/4x, choose cheese.
1/8 of the students, or 1/8x, choose sausage.
4 students choose mushrooms.

We know that if we add all of the students together we will get the total number of students, which we defined as x:

1/2x+1/4x+1/8x+4=x

We will use 8 as the common denominator of these fractions:
4/8x+2/8x+1/8x+4=x

Adding like terms,
7/8x+4 = x

Subtract 7/8x from both sides:
7/8x+4-7/8x = x-7/8x
4 = 1x-7/8x
4 = 1/8x

Divide both sides by 1/8:
4÷(1/8) = 1/8x÷(1/8)
4/1 ÷ 1/8 = x
4/1 × 8/1 = x
32/1 = x
32 = x

There are 32 students.
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