Th

e M

ailb

ox

Nam

e

Usi

ng

vari

able

s

Dat

e

Cu

pc

ak

es

'n

' M

or

eCo

mpl

ete

each

equ

atio

n an

d so

lve fo

r the

var

iabl

e.

Then

writ

e th

e an

swer

on

the

line.

T

here

are

thre

e ch

ildre

n in

the

Eato

n fa

mily

. The

ir co

mbi

ned

ages

equ

al 35

ye

ars.

Ima

is 12

yea

rs o

ld,

and

her s

ister

, Miss

y, is

nin

e.

How

old

is th

eir b

roth

er, B

en?

n =

___________

____

12 +

9 +

n =

_____

T

he b

aker

y ca

se h

olds

75

0 cu

pcak

es. T

here

ar

e 50

cup

cake

s in

ea

ch ro

w. H

ow m

any

row

s ar

e th

ere?

_____ =

50

n

T

he E

aton

s ba

ked

twice

as

man

y cu

pcak

es a

s co

okie

s. T

hey

mad

e 60

cu

pcak

es a

nd c

ookie

s in

al

l. Ho

w m

any

cupc

akes

di

d th

ey b

ake?

How

m

any

cook

ies?

n +

2n =

_____

M

issy

frost

ed 1

7 cu

pcak

es

befo

re lu

nch.

By

4:00

pm

,

she

had

frost

ed s

ever

al

times

that

man

y cu

pcak

es.

Miss

y fro

sted

68

cupc

akes

in

all.

How

man

y cu

pcak

es

did

she

frost

afte

r lun

ch?

17 +

n =

_____

The

Eato

ns b

aked

a to

tal

of 5

28 c

ookie

s. T

here

w

ere

two

doze

n co

okie

s in

eac

h ba

tch.

How

man

y ba

tche

s di

d th

ey b

ake?

_____ x

n =

52

8

T

he E

aton

s ha

d a

thre

e-da

y cu

pcak

e sa

le. T

hey

sold

twice

as

man

y cu

pcak

es o

n Tu

esda

y as

th

ey s

old

on M

onda

y an

d th

ree

times

as

man

y on

W

edne

sday

as

on M

onda

y.

They

sol

d 90

0 cu

pcak

es

in a

ll. Ho

w m

any

cupc

akes

di

d th

ey s

ell o

n M

onda

y?

n +

2n +

3n =

_____

It to

ok Im

a tw

o ho

urs

to

mak

e an

app

le p

ie. S

he

spen

t 25

min

utes

mak

ing

the

fillin

g an

d 20

minu

tes

mak

ing

the

crus

t. Ho

w lo

ng d

id th

e pie

bak

e?

25 +

20

+ n =

_

__

__

T

he E

aton

s se

ll tub

s of

th

eir f

amou

s ch

ocol

ate

icing

. The

y sold

ten

16-o

unce

tubs

of i

cing

and

seve

ral e

ight-o

unce

tu

bs. A

ltoge

ther

they

sold

280

ounc

es o

f icin

g. H

ow

man

y ei

ght-o

unce

tubs

di

d th

ey s

ell?

(10 x

16) +

(n x

__

__

_) =

____

_

D

urin

g a

five-

day p

eriod

, Be

n wo

rked

in th

e ba

kery

for a

tota

l of 1

8 ho

urs.

He

work

ed fo

ur

hour

s a

day

for t

he fi

rst

four

day

s. H

ow lo

ng d

id he

wor

k on

the

fifth

day

?

(4 x 4

) + n

= _

__

__

M

r. Ea

ton

sold

$1,00

0 wort

h of

cup

cake

s and

cook

ies.

He s

old

30 d

ozen

cup

cake

s at

$18 p

er do

zen,

and

he

sold

coo

kies

at $1

0 per

doze

n. H

ow m

any

doze

n co

okie

s di

d he

sel

l?

(30 x

18) +

(n x

10) =

____

_

12

34

5

67

89

10

Bon

us: T

he E

aton

s so

ld 3

6 pi

es fo

r $12

each

. The

y also

sold

slice

s of p

ie for

$3 ea

ch. In

all, t

hey m

ade $

600.

How

man

y sli

ces

of p

ie d

id th

ey s

ell?

Writ

e an

d so

lve th

e eq

uatio

n.

n =

______

_________

n =

_______________

n =

__

__

__

__

__

____

_n

=

__

__

__

__

__

____

_

n =

___________

____

n =

_______

________

n =

_______________

n =

__

__

__

__

__

____

_n

=

__

__

__

__

__

____

_

The Mailbox

Answer Key

1. 12 + 9 + n = 35, 14 years old 2. n + 2n = 60; 40 cupcakes, 20 cookies 3. 24 x n = 528, 22 batches 4. 25 + 20 + n = 120, 1 hour and 15 minutes 5. (4 x 4) + n = 18, 2 hours 6. 750 = 50n,15 rows 7. 17 + n = 68, 51 cupcakes 8. n + 2n + 3n = 900, 150 cupcakes 9. (10 x 16) + (n x 8) = 280, 15 8-ounce tubs 10. (30 x 18) + (10 x n) = 1,000; 46 dozen

Bonus: (36 x 12) + (n x 3) = 600, 56 slices