Pam K.

asked • 10/06/12

Please check my work and let me know if it is correct. Thank you.

Please check my work below and let me know if it is correct.

Function: A function is a set of mathematical operations performed on one or more inputs (variables) that results in an output.

The solutions are 12 and 6

addition equation:

x-3=3

x-6+0=3+3

x+0=6

x+6

check:

x-0=6

6-0=6

6=6

subtraction method:

x + 6=12

x +6-6=12-6

x+0=6

x=6

check:

x + 6= 12

6+6=12

12=12

2 Answers By Expert Tutors

By:

John R. answered • 10/08/12

John R: Math, Science, and History Teacher

Pam K.

Thanks so much for your help!

Report

10/09/12

Rick N. answered • 11/11/12

SAT, GMAT Preparation and General Subject Assistance

Lorraine T.

Your approach does not reinforce the principle of equality, that what you do to one side, other than simplifying, you must also do to the other.  Before equations get more complicated, it is a good idea to establish the habit of keeping equations balanced and also writing out each step so it is easier to visually check the work.

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01/28/13

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