If it's not what You are looking for type in the equation solver your own equation and let us solve it.
w in (-oo:+oo)
w/(-7) = -3 // + 3
w/(-7)+3 = 0
3-1/7*w = 0 // - 3
-1/7*w = -3 // : -1/7
w = -3/(-1/7)
w = 21
w = 21
| t-8=-14 | | b+9=11 | | d+3=7 | | n+5=4 | | k+7=17 | | d-9=-19 | | Y-4=6y-19 | | 5+n=9 | | 14=a+7 | | 5=n+6 | | w-5=4 | | -2=k-10 | | 5q+11=9q-5 | | -39.00+x=17 | | 10+d=5 | | 3d=-36 | | 7=d+8 | | -2n=-12 | | 9+5(3-4x)=27 | | 9=6v-6-3v | | k+1=-5 | | d-10=-21 | | a+8=10 | | t/-2=-4 | | 4+m=4 | | d+5=-6 | | x=25+-2y | | -1=b-10 | | 3+n=-2 | | -3t=0 | | 7=m+6 | | m-6=-6 |