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21 December, 09:49

What is the first thing you should look for, to determine whether you are going to solve by substitution or elimination? *

a. If they have the opposite signs

b. If the numbers and variables are the same

c. If a variable is already solved for

d. If the numbers are the same

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Answers (1)
  1. 21 December, 10:19
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    A. If they have opposite signs
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