Question

solve by substiution method x=5 ; 2x+y=10​

Answer 1

$\bf{\underline{\underline{Given\: :}}}$

$\mathsf{ \bigstar\: 2x + y = 10}$

$\mathsf{ \bigstar\: x = 5}$

$\bf{\underline{\underline{To\:find\: :}}}$

$\mathsf{\bigstar\: Value\:of\: y}$

$\bf{\underline{\underline{Solution\: :}}}$

$\mathtt{\implies\: 2x + y = 10}$

$\mathtt{\implies\: 2(5) + y = 10\:\:(Using\:x = 5)}$

$\mathtt{\implies\: 10 + y = 10}$

$\mathtt{\implies\: y = 10 - 10}$

$\mathtt{\implies\: y = 0}$

$\mathsf{\diamond\:\: Since, \:y = 0}$

$\mathsf{\implies\: y\: will\: not\: exist}$

Answer 2

Given equation,

$x=5\\2x+y=10$

Substituting, x=5, in the 2nd eq, we get,

$2x+y=10\\2(5) + y = 10\\10+y=10\\y=10-10\\\\\boxed{\boxed{\bold{y=0}}}$