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29 October, 02:17

Which is most likely the first step in solving a system of nonlinear equations by substitution?

A. Substituting a number for one of the variables

B. Substituting one equation into the other equation

C. Isolating a variable in one of the equations

D. Taking the square root of both sides of one of the equations

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Answers (1)
  1. 29 October, 03:39
    0
    The correct answer is:

    C) isolating a variable in one of the equations.

    Explanation:

    In order to solve a system of equations using substitution, we must have one of the variables isolated; this is the only way we have something to substitute. If one of the variables is not already isolated, that must be our first step.
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