Transcript Multiplying/Dividing Equations

Solving
equations by
multiplying or
dividing
8X = -128
8
8
X = -16
-4X = -56
-4 -4
X = 14
X
8•
= -11 • 8
8
X = -88
X
-7•
= 49 • -7
-7
X = -343
¼X = 20 ÷ ¼
¼
20 • 4
1 1
X = 80
-⅗X = -21 ÷ -⅗
-⅗
7
-21 • -5
1 31
X = 35
Gary needs to buy a suit to go to a formal
dance. Using a coupon, he can save $60, which
is ¼ of the cost of the suit. Write and solve an
equation to determine the cost of the suit.
¼ · x = $60 ÷ ¼
¼
60 1
÷
1 4
60 4
·
1 1
240 = 240
1
1
2
5
9
10
13
15
16
19
72
74
132
160
300
450
605
612
676
2625
-4
-5
-6
-6
-7
-11
-12
-16
-20
-26
-99
-135
-567
-576
Answer
Bank
For
Solving
Equations
By
multiplying
And
dividing
Skip 18, 20, 40, 42, 54, 58