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Mathematics 19 Online
OpenStudy (anonymous):

Jennifer wrote the following steps to simplify the expression: 3 – (x + 2x – 5). Which step of justification is incorrect, and what should the justification for that step be to simplify the expression? Step 3; Associative Property of Addition Step 2; Associative Property of Addition Step 1; Commutative Property of Multiplication Step 4; Multiplication Property of Equality

OpenStudy (anonymous):

OpenStudy (anonymous):

im almost positive it is either the 1st or 2nd choice but these charts confuse me

OpenStudy (anonymous):

what is the question? i am lost

OpenStudy (anonymous):

Which step of justification is incorrect, and what should the justification for that step be to simplify the expression?

OpenStudy (anonymous):

oh i see 3 should be "associative"

OpenStudy (anonymous):

ok yeah thats what i had chosen but i wasnt sure

OpenStudy (anonymous):

introduced parentheses , although strictly speaking there should be parentheses in the previous one too, or if you decide that parentheses don't matter, you do not need to introduce them ok nvm

OpenStudy (anonymous):

so the answer is "Step 3; Associative Property of Addition"

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