If it's not what You are looking for type in the equation solver your own equation and let us solve it.
-40=5k
We move all terms to the left:
-40-(5k)=0
We move all terms containing k to the left, all other terms to the right
-5k=40
k=40/-5
k=-8
| 3r+10=-10+8r | | 5g+1=5g | | 9+7z=4z−9 | | 5−7v=-8v | | 4q−4=-9+4q | | 9v+4=-6+8v | | 13c-20+16c+238=953 | | 5−f=1−f | | -1−9w=-10w−10 | | 12c-15+15c+176=1404 | | 5y+2=2+5y | | -3/2^x+12=2x-3 | | 9k−6=2+7k | | 10+10j=10j+10 | | 6z+3=5+6z | | X-27=4(x-3) | | 1+3p=-4p+8 | | 14c-25+16c+238=1268 | | 10(7-x)=32 | | -3s−1=-3s | | -7y+5=5−7y | | -3(p-6)+7p=18+4p | | 11c-10+18c+459=817 | | 8p=2+4p-10 | | 10(7-c)=32 | | 7t=8t+7 | | 11c-10+17c+342=652 | | 36x-3=216 | | 36(x-3)=216 | | 2-a=5-3(1+8a) | | 3(n-2)=-5+3n | | 2(-3x-1)=-2(x-2)(x+7) |