Question

Find k, so that x = 3 is a solution of the equation kx + 8 = x - 7.​

Answer 1

Step-by-step explanation:

KX + 8 = x-7

k(3) + 8 = (3) -73k +8

= 43k

=-8+(-4)3k=-12

k=-12/3k=-4

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Answer 2

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$\huge{\underline{\underline{\sf{\blue{SOLUTION:-}}}}}$

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$\sf{\underline{\green{AnswEr:-}}}$

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• The required value of K = -4

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$\sf{\underline{\green{Given:-}}}$

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• X = 3 is a solution of the equation Kx + 8 = x - 7.

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$\sf{\underline{\green{Find:-}}}$

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• The required value of K = ?

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$\sf{\underline{\green{Explanation:-}}}$

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$\sf{\underline\pink{A.T.Q:-}}$

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$\longrightarrow \sf {Kx + 8 = x - 7}$

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$\longrightarrow \sf {Kx3 + 8 = 3 - 7}$

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$\longrightarrow \sf {3K = - 4 - 8}$

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$\longrightarrow \sf {3K = -12}$

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$\longrightarrow \sf {K = \cancel\dfrac{-12}{3} }$

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$\longrightarrow \sf {K = -4}$

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$\:\:\:\:\dag\bf{\underline{\underline \red{Hence:-}}}$

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• The required value of K is -4.

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$\rule{200}{2}$