6th Grade Math Textbook, Fundamentals

Lesson 2-7 for exercise sets. &KDSWHU 

Solve and check. Use the Multiplication Property of Equality.

1.  3 2.y 8  56 3. 5  4. 93 


2.  9 6.  11 7. u 40 8. |13|

9.Discuss and Write Explain why you use the Multiplication Property of Equality

to solve division equations. Give examples to justify your answer.

m

 7

x

12

a

10

1

6

e

 11

s

 25

w

 13

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Leslie and 6 friends went out to dinner. The 7 friends divided the cost of the

dinner equally. Leslie’s share was $48. What was the total cost of dinner?

Let tthe total cost of the dinner.

Solve:  48

(7)48

t 336

So the total cost of the dinner was $336.

t

7

1

7

1



t

7

Multiply both sides by

7 to isolate t. Simplify.

5

Check:  48

48

48  48 Tr u e

(^336) ?
7
48
1
t
7
Substitute 336
for t. Simplify.
Solve: |3|
(12) 3(12)
 36 Simplify.
x 36
x
 12
x
 12
x
 12
1
 12
1

Multiply both sides
by 12 to isolate x.
(^2) Check: |3|
3 Substitute 36 for x.
3  3 Tr u e
 (^36) ?
 12
x
 12
Solve: z(6)  22
z(6)22(6)
z 132
Multiply both sides
by 6 to isolate z.
3 Check:z(6)  22
132 (6)  22
 22  22 Tr u e
? Substitute
132 for z.
Solve: a 16
 16 Write as.
(3) 16(3)
a 48
Multiply both sides
by 3 to isolate a.
a
3
1 a
3
a
3
a
3
1
4 3 Check: a 16
(48) 16 Substitute 48 for a.
16  16 Tr u e
(^1) ?
3
1
3