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)
(1/3)*(a-6) = 28 // - 28
(1/3)*(a-6)-28 = 0
1/3*(a-6)-28 = 0
1/3*(a-6)-28 = 0
1/3*a-30 = 0
1/3*a-30 = 0
1/3*a-30 = 0 // + 30
1/3*a = 30 // : 1/3
a = 30/1/3
a = 90
a = 90
| y=1/4x-20 | | 2/3x+8=-2 | | 4c+17.2=6c+10.8 | | 2x-12=-2(x-2) | | -20=(-4x)-6x | | 16c+11c+14=95 | | 7(4-3z)=-8(2z-1) | | X-u=5 | | -8(w+6)=-5w-39 | | 35=-6(2p-5) | | 4(2j-5)=3j+10 | | -11+6a=-12(a-6)-9(-a+8) | | 4x^3+23x-2x=0 | | 3/4x-8=91 | | -3x-6=6(x+2) | | 20x-3(5x+4)-11=233 | | 99+65x=261.50 | | 5a+3-a=7 | | 0.1-0.01(x+2)=-0.05(2-x) | | x/-3+10=18 | | 2x+8=3x-5(x+4) | | 6x+8-3x=-16 | | (x^2-3)(x^2-3)+4=-4(x^2-3)-4 | | 891=L(1-0.10) | | 3p-15=2p+2 | | 192+48x=432 | | v^2-19v+14=0 | | 6(8-5i)-(8i)= | | 4(u+4)=-3u-47 | | 23=-7x-2x+5 | | 3(x-21)=4+2x | | 10(x+3)-(-8x-4)=x-5+3 |