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Choose the One Alternative That Best Completes the Statement or Answers

question 173

Multiple Choice

Choose the one alternative that best completes the statement or answers the question.
Determine whether the ordered pair is a solution of the system.
- 5x7y=21;(7,8) 4x+9y=97\begin{array} { l } 5 x - 7 y = - 21 ; \quad ( 7,8 ) \\4 x + 9 y = 97\end{array}


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