Question

solve y= 2x x=2y-9 using simultaneous equations​

Answer 1

Answer:

$\huge \bold  {\fbox{\underline \red{ ❥Answer࿐}}}$

$❁ \: y = 2x \\ \\ 2x - y = 0 \: ...(1) \\ \\ ❁ \: x = 2y - 9 \\ \\ x - 2y + 9 \: ...(2)$

$\bold{On \: Adding \: ( {eq}^{1} \:and \: {eq}^{2})}$

$⇒ \: 2x - y = 0 \\ ⇒ \: x - 2y = 9 \\ \\ = 3y = 9 \\ \\ y = \frac{ 9}{3} = 3 \\ \\ y = 3$

$\bold{Putting \: y \: value \: in \: {eq}^{1} }$

$⇒ \: 2x - y = 0 \\ ⇒ \: 2x - 3 = 0 \\ ⇒ \: x = 3 + 2 = 5$

$\bold \red{Hence, The \: Value \: of } \\ \\ \bold{x = 5} \\ \bold{y = 3}$