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