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The following is a student solution to the inequality 724-x+18x-36:

(1) 724-x+18x-36

(2) 724-33x+1844x-36

(3) 724-3x+3244x-324

(4) 7-3x+34x-3

(5) 7-3x-34x-3

(6) 4-3x4x-3

(7) -7x-7

(8) x1

There are two mathematical errors in this work. Identify at what step each mathematical error occurred and explain why it is mathematically incorrect.

 Apr 30, 2018
 #1
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Do you know what "inequality" is? And where is it in your expression 724 - x  +  18x  -  36 ??!!

 May 1, 2018

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