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Q.9 Find the value of k, if x = 1, y = 2 is a solution of the equation 2x + 3y =k.a. 5b. 6c. 7d. 8

Answer»

ANSWER:

Thevalueofk=7

Step-by-step explanation:

\begin{gathered} GIVEN , \\linear \: equation \: in \\\: TWO \:variables \: x \: and\: y \: is \\\: 2x+3y=k \END{gathered}

Given,

linearequationin

twovariablesxandyis

2x+3y=k

\begin{gathered} Substitute \: x=2 ,y=1 \: in \: the \: equation ,\\ we \: get \end{gathered}

Substitutex=2,y=1intheequation,

weget

2\times 2 + 3\times 1 = k2×2+3×1=k

\implies 4+3=k⟹4+3=k

\implies 7 = k⟹7=k

Therefore,

The \: value \: of \: k = 7Thevalueofk=7

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