Update your skills. See page 7.
Multiplication and Division Equations
4-7
An object on Jupiter weighs about 2.6 times its
weight on Earth. If a spacecraft weighs 4914 lb
on Jupiter, what is its weight on Earth?
To find its weight on Earth, write and solve
an equation.
Let yrepresent the spacecraft’s weight on Earth.
2.6 times object’s weight on Earth is object’s weight on Jupiter
2.6y 4914
To solve a multiplication equation,
use the Division Property of Equality.
2.6y 4914
2.6y2.6 4914 2.6
y 1890
Check: 2.6y 4914
2.6•^1890
?
4914
4914 4914 True
The spacecraft weighs 1890 lb on Earth.
To solve a division equation, use the
Multiplication Property of Equality.
Solve: 192
- 14 192 • 14
x 2688
Check: 192
?
192
192 192 True
2688
14
x
14
x
14
x
14
Divide both
sides by 2.6
to isolate the
variable.
Multiply both
sides by 14
to isolate the
variable.
multiplication equation
Remember:
Multiplication and division
are inverse operations.
Division Property of Equality
When you divide both sides of an
equation by the same number,
you get a true statement.
Multiplication Property of Equality
When you multiply both sides of an
equation by the same number, you
division equation get a true statement.
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