find k if kx +2y=6 and x=-1 and y =2
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⇢kx+2y=6
\dashrightarrow \blue{x=-1}⇢x=−1
\dashrightarrow \blue{y=2}⇢y=2
\large\underline\mathfrak{\red{TO\:FIND,}}
TOFIND,
\dashrightarrow \blue{The\:value\:of\:k}⇢Thevalueofk
\large\underline\bold{\pink{\mathfrak{SOLUTION,}}}
SOLUTION,
\implies \green{kx+2y=6}⟹kx+2y=6
\therefore \orange{putting\:the\:value\:of\:x\:and\:y\:.}∴puttingthevalueofxandy.
\implies \purple{k(-1)+2(2)=6}⟹k(−1)+2(2)=6
\implies \purple{-k+4=6}⟹−k+4=6
\implies \purple{-k=6-4}⟹−k=6−4
\implies \purple{-k=2}⟹−k=2
\implies \purple{k=-2}⟹k=−2
\rm{\boxed{\bf{\circ\:\: k=-2\:\: \circ }}}
K = 2
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