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Veseljchak [2.6K]
3 years ago
12

In a class of 23 student the girls were 7 more than the boys how many boys were in the class​

Mathematics
1 answer:
Softa [21]3 years ago
5 0

Answer:

x=# of boys

x+7=# of girls

x+x+7=25

2x+7=25

2x=25-7

2x=18

x=18/2

x=9 boys

x+7=16 girls

 

If you don't understand variables use trial and error.

 

Boys     Girls

1           8

2           9

3           10

4           11

5           12

6           13

7           14

8           15

9           16   9+16=25 students

 

You could start this way...

 

Boys     Girls

12        13

11        14

10        15

9          16     16 is 7 more than 9

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8 0
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Suppose the population of a town is 15,200 and is growing 2% each year. Write an equation to model the population growth. Predic
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<span><span>1.       </span>So the current population of the town is 15 200 and is growing per year with 2%.
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