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galavivi
galavivi galavivi
  • 21-11-2014
  • Mathematics
Answered

Alice solved the following equation:


-18 - 3x = 12

-3x = 6

x =-2


Which of the following statements is true?




Alice is correct.


The 6 should be 30 in step two.


The 6 should be -6 in step two.


The 6 should be -4 in step two.

Verified Answer :

yazzzyxx yazzzyxx
  • 21-11-2014

The 6 should be 30 in step 2 because you have to add 18 to both sides to cancel out the -18.

Answer Link
apologiabiology
apologiabiology apologiabiology
  • 21-11-2014

so
-18-3x=12
to get to -3x=12+-somthing
we must add 18 to both sides or
+18-18-3x=12+18
-3x=30
so 'The 6 should be 30 in step 2' is correct
x=-10

Answer Link

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