# Math Help - Solve for the unknown variable

1. ## Solve for the unknown variable

n+12=-2(3-5n)

2k+9
_____=7
3

Thanks,

2. Originally Posted by LOL
n+12=-2(3-5n)

2k+9
_____=7
3

Thanks,
$n+12=-2(3-5n)$

$n+12=-6+10n$

$18=9n$

$\therefore\;n=2$

$\frac{2k+9}{3}=7$

$2k+9=21$

$2k=12$

$\therefore k=6$