Question

For the equation 3x+y=7 when x=3 find the value of 'y'.​

Answer 1

Answer:

(-2)

Step-by-step explanation:

3x+y=7

x=3

Substituting x=3 in the equation,

3(3)+y=7

9+y=7        

y=7-9        {Taking 9 on the other side of equation, it's sign changes from+ to -}

y=(-2)

Answer 2

$\bf{ \huge \: \underline{ \underline{Question }}\: : }$

$\\ \sf \: For \: \: the \: \: equation \: \: 3x+y=7 \: \: when \: \: x=3 \: \: find \: \: the \: \: value \: \: of \: \: 'y'.$

$\\ \bf{ \huge \: \underline{ \underline{Answer}}\: : }$

$\\ \sf \: Equation \: \: given \: : \: \: 3x+y=7$

$\sf \: when \: \: x=3 \: , \: we \: \: have \: \: to \: \: find \: \: the \: \: value \: \: of \: \: y \: .$

$\sf \: So \: , \: we \: \: substitute \: \: x =3 \: \: in \: \: the \: \: given \: \: equation \: ;$

$\sf3(3)+y=7 \\ \\ \sf(3×3 = 9 )\\ \\ \sf9+y=7$

$\sf \: Taking \: \: 9 \: \: to \: \: the \: \: RHS \: , \: where \: \: its \: \: will \: \: be \: \: subtracted \: ;$

$\sf \: y=7-9 \\ \\ \sf \underline{\:\underline{\: y=(-2)}}$

$\\ \\ \boxed{\sf The \: \: value \: \: of \: \: y \: \: is \: \: (-2).}$

$\\ \\ \\ \bf \: Hope~~this~~helps~~you~!$