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3.8

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Word Document File

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41 KB|5 pages and answers worked out

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Product Description

In a two variable equation, one variable is solved in terms of the other. For example, if you have a problem with the variables x and y, you might be told to solve x. This means y will be part of the answer. If you are told to solve for y, then x will be part of the answer.

Here is an example:

Solve the following equation for y:

2x – y = 4

Hint: You are solving for y, so you must isolate y on one side of the equation. In other words, the variable y must stand alone.

Here are the steps:

2x – y = 4

2x – 2x – y = 4 – 2x

– y = 4 – 2x

–1( –y) = –1(4 – 2x)

y = –4 + 2x

There are more problems for the student to try and each problem has an answer that is worked out in just this manner with every step shown. A problem that is missed can be compared with the answer so that the student can find the step in which he missed an operation or a sign. That way, even checking answers becomes part of the learning process.

Here is an example:

Solve the following equation for y:

2x – y = 4

Hint: You are solving for y, so you must isolate y on one side of the equation. In other words, the variable y must stand alone.

Here are the steps:

2x – y = 4

2x – 2x – y = 4 – 2x

– y = 4 – 2x

–1( –y) = –1(4 – 2x)

y = –4 + 2x

There are more problems for the student to try and each problem has an answer that is worked out in just this manner with every step shown. A problem that is missed can be compared with the answer so that the student can find the step in which he missed an operation or a sign. That way, even checking answers becomes part of the learning process.

Total Pages

5 pages and answers worked out

Answer Key

Included

Teaching Duration

N/A

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