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)
3*w+4 = 40 // - 40
3*w-40+4 = 0
3*w-36 = 0 // + 36
3*w = 36 // : 3
w = 36/3
w = 12
w = 12
| -7/10+6/7t=431/70 | | -4.40=1.20(t+1) | | -5w+1/2=-29/2 | | 5w-1=31/9 | | 3k-3/5=-63/5 | | -7+1/5a=-28/5 | | 1/2b+2/3=13/15 | | 5k+9=44 | | 2/5+7m=-83/55 | | 9k^2+38k=-8 | | 3-5/7w=47/14 | | -1/7x+1/2=-3/14 | | 10-6a=17/2 | | 1/3n+10=148/15 | | -1/8+3w=-217/8 | | 2/9+7x=191/9 | | 6/7x-1=-2/7 | | -5t-1/9=494/9 | | 7n+7/8=35/8 | | 1/4b+6=7/2 | | 4b+7=81/11 | | 1-7b=-5/2 | | -d+4=11 | | 3a-1/5=11/5 | | 36r^2-24=0 | | -6+7k=15 | | 1/5-2w=-23/35 | | -1+7a=-2 | | 1+3/4x=-17/4 | | -8/9+1/2m=-7/18 | | 4/7d+3=25/7 | | 1/2+3b=2 |