If it's not what You are looking for type in the equation solver your own equation and let us solve it.
3k+k+12=0
We add all the numbers together, and all the variables
4k+12=0
We move all terms containing k to the left, all other terms to the right
4k=-12
k=-12/4
k=-3
| (5 − 3 t)=(5 + 3 t) | | H=-2t÷12 | | H=-2t+12 | | 7y=3×1/2 | | 10+15t=15t-9t | | x8=10 | | (7-v)(5v+4)=0 | | 112=225-w | | -w+227=30 | | 300b+100(40-b)=8400 | | 300b+400-300b=8400 | | .0.7x+0.4=0.6x+2.4 | | 3=-a+1 | | 220=67-y | | P=4–(QxQ) | | 4z+9=5 | | 226=-y+175 | | (x3+3⁴x-3²3=2-3x+3x-9=x2-9) | | 7y=31/2 | | 203-w=30 | | 300p+840000-100p=8400 | | 3x-12/4+x/12=x/3-2 | | 7/6=-9/8t | | -u+188=142 | | 3/5z=1 | | 8x−164x−24=0 | | 6/5x+2/9=-1 | | 14-4(x+3)=12(x+4)-28 | | 9/16=-y/8 | | *|2x-1|=0.5 | | 9-6(1-5b)=-16 | | -9k+2-5k=-29 |