If it's not what You are looking for type in the equation solver your own equation and let us solve it.
a in (-oo:+oo)
7 = (-1/6)*a // - (-1/6)*a
7-((-1/6)*a) = 0
(1/6)*a+7 = 0
1/6*a+7 = 0 // - 7
1/6*a = -7 // : 1/6
a = -7/1/6
a = -42
a = -42
| (18x–36)/(3x-21) | | x^3-6x^2-72=0 | | 26+-5x=11 | | 5x+3x+2x+55=180 | | 48+1x=56 | | x/36=1/18 | | 4x*10=32 | | 378+3a-17b=0 | | -4a+2+5a=11-28 | | 1/4-5=4 | | 2/3x-6=1/2x=8 | | 42x-7=0 | | 7x+3+4=25 | | -1x+95=85 | | r^2-4r+10=6 | | 1/12(6)x=108 | | 2/8=11/x | | 120-12x=66 | | 19-2x=-5 | | 6x/16=81 | | 7.632x^2-7.632=2381.185 | | 61+-5x=36 | | 77+-6x=65 | | 5x^4=44 | | 167-12x=47 | | 3x^2-4x+13=2x(x-2)+29 | | -4x+71=43 | | 2t^2+10t-8=0 | | 5x^3+2y-10= | | 30+-6x=18 | | 25y=.394*25 | | 2x+3+5=130 |