Question

Please solve the system of equations !!

Answer 1

`\bold{\huge{\red{\underline{ Solution}}}}`

`\bold{\underline{ We \: have\: given :-}}`

`\sf{ 2x + 7y = 3 ...eq(1 ) }`

`\sf{ x = -4y ...eq(2) }`

Here, we will use the substitution method for solving the above equations.

`\bold{\underline{Subsitute \: eq(1)\:in \: eq(2)}}`

`\sf{ 2(-4y) + 7y = 3 }`

`\sf{ -8y + 7y = 3 }`

`\sf{ - y = 3 }`

`\sf{ y = - 3. ...eq( 3) }`

`\bold{\underline{Subsitute \: eq(3)\:in \: eq(2)}}`

`\sf{ x = -4(-3) }`

`\sf{ x = 12 }`

`\sf{\blue{ Hence, \: The \:value \:of \:x \:and \:y \:is\: 12\: and \:-3}}`