Question

find k if kx +2y=6 and x=-1 and y =2​x​

Answer 1

$\huge\mathtt{\fbox{\red{Answer✍︎}}}$

$\large\underline\mathfrak{GIVEN,}$

$\dashrightarrow \blue{kx+2y=6}$

$\dashrightarrow \blue{x=-1}$

$\dashrightarrow \blue{y=2}$

$\large\underline\mathfrak{\red{TO\:FIND,}}$

$\dashrightarrow \blue{The\:value\:of\:k}$

$\large\underline\bold{\pink{\mathfrak{SOLUTION,}}}$

$\implies \green{kx+2y=6}$

$\therefore \orange{putting\:the\:value\:of\:x\:and\:y\:.}$

$\implies \purple{k(-1)+2(2)=6}$

$\implies \purple{-k+4=6}$

$\implies \purple{-k=6-4}$

$\implies \purple{-k=2}$

$\implies \purple{k=-2}$

$\rm{\boxed{\bf{\circ\:\: k=-2\:\: \circ }}}$

$\large\underline\mathfrak{THE\:VALUE\:OF\:k\:IS\:-2}$

Answer 2

Answer:

$⇢kx+2y=6</p><p></p><p>\dashrightarrow \blue{x=-1}⇢x=−1</p><p></p><p>\dashrightarrow \blue{y=2}⇢y=2</p><p></p><p>\large\underline\mathfrak{\red{TO\:FIND,}}TOFIND,</p><p></p><p>\dashrightarrow \blue{The\:value\:of\:k}⇢Thevalueofk</p><p></p><p>\large\underline\bold{\pink{\mathfrak{SOLUTION,}}}SOLUTION,</p><p></p><p>\implies \green{kx+2y=6}⟹kx+2y=6</p><p></p><p>\therefore \orange{putting\:the\:value\:of\:x\:and\:y\:.}∴puttingthevalueofxandy.</p><p></p><p>\implies \purple{k(-1)+2(2)=6}⟹k(−1)+2(2)=6</p><p></p><p>\implies \purple{-k+4=6}⟹−k+4=6</p><p></p><p>\implies \purple{-k=6-4}⟹−k=6−4</p><p></p><p>\implies \purple{-k=2}⟹−k=2</p><p></p><p>\implies \purple{k=-2}⟹k=−2</p><p></p><p>\rm{\boxed{\bf{\circ\:\: k=-2\:\: \circ }}}∘k=−2∘</p><p></p><p>\large\underline\mathfrak{THE\:VALUE\:OF\:k\:IS\:-2}THEVALUEOFkIS−2</p><p></p><p>$