If there are 23 people in the class altogether and there are seven more boys then girls, then you subtract 7 from 23

eg. 23 – 7=16

And then you divide 16 by 2 which will tell you how many boys and girls.

eg. 16 / 2 = 8

So there are 8 boys and 15 girls (seven more girls then boys).

These questions can get sooooo confusing hey? You just need to work through them bit by bit

Goodluck!!

23 – 7 = 16

16 / 2 = 8

8 + 7 = 15

(x – 7) / 2 + 7 = y

x = total class memberzz

y = total girlzz in class

variable either boys or girls

and we know

boys+girls=students

is the equation we need.

students=23

if x=boys

then girls=x+7

because there are 7 more

(more means addition)

substitute the values into

the equation

and

boys+girls=students

becomes

x + (x +7)= 23

x+x+7=23 (subtract 7 from each side)

x+x=16

2x=16 (divide both sides by two)

boys=16/2=x

now go back

girls=x+7=

if you chose

girls=x, then

boys=x-7

do the same process

you should get the same answers

so then x+7 =girls

you know you have 23 total so…

x +x+7=23

Subtract 7 on each side

x+x+7-7=23-7

Simplify

2x=16

divide each side by 2

x=8

so there are 8 boys

now remember x+7 was girls

8+7=15 girls

Check your answer

8 (boys) +15(girls) = 23 students

15 girls, 8 boys

7-23=16

16/2=8

8-23=15

8-15=7

8 boys

15 girls

g = b + 7

and

g + b = 23

so b + 7 + b = 2b + 7 = 23

2b = 16

b = 8

g = 15

x is the girls

y is the boys

x+y=23

x+7 is y

so you insert that: x+x+7

you now have 2x+7=23

subtract the 7 and you get 16.

Divide by 2 and you get x=8.

then you put 8 into x and you get y is 15.

You can handle it from here.

g+b=23

b+7+b=23

2b+7=23

2b=16

b=8

g=8+7=15