If it's not what You are looking for type in the equation solver your own equation and let us solve it.
x in (-oo:+oo)
7*x-10 = -80 // + 80
7*x-10+80 = 0
7*x+70 = 0 // - 70
7*x = -70 // : 7
x = -70/7
x = -10
x = -10
| -5m+1=41 | | 4m+2=14 | | 3-2w=7 | | 6+5t=-19 | | 5m-10=50 | | 5w-2=43 | | 7d+9=-75 | | 9+3w=-18 | | -x/4=-5/8 | | 4-6w=4 | | 10+3x=37 | | -9+4a=-37 | | -6+4n=-34 | | -4+6x=20 | | 5-4t=13 | | 8+7n=57 | | 7n-1=34 | | -4k+7=35 | | -7-2d=-11 | | -2d+4=18 | | -7w-9=-37 | | -5m-1=44 | | -3t+5=-19 | | 4d-1=19 | | 4t+4=8 | | 5b-6=29 | | 4w+1=33 | | 8-7k=8 | | 5x-6=-51 | | 2+2d=-20 | | 7-4d=7 | | -9+4k=39 |