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Question

Question 20

Fill in the blanks to make each statement true:

9x- ............... =-21 has the solution (-2).

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Solution

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Let 9x-m=-21 has the solution (-2).
Since, x=-2 is the solution of the equation.
9×(2)m=2118m=2118+21=mm=3
Hence, 9x-3=-21 has the solution(-2).


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