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)
4*(5*a-8) = 88 // - 88
4*(5*a-8)-88 = 0
4*(5*a-8)-88 = 0
20*a-120 = 0
20*a-120 = 0
20*a-120 = 0 // + 120
20*a = 120 // : 20
a = 120/20
a = 6
a = 6
| 4(-7b+4)=-208 | | 5(-9+3t)=-75 | | 4(8-3k)=-100 | | 7(2-4w)=182 | | 2(4k+8)=64 | | 4(-9+3b)=-36 | | 4(-1w+2)=36 | | 7(2k-2)=28 | | 3(1x+7)=21 | | 3(1m-7)=3 | | 8x^2+20+8=o | | 2(7m+8)=16 | | 4(4-4x)=-32 | | 4(-1n+3)=-8 | | 4(7+3t)=-92 | | 10x=-45 | | 3(-9+k)=-45 | | 5(4w+6)=50 | | 2(3m+8)=64 | | 6y-4=4y-16 | | -4x=31 | | 7(4+2d)=154 | | 4(-1+5x)=56 | | 7(3+m)=21 | | 5(-3t+6)=-60 | | 2(5t+1)=102 | | 3(6n-3)=117 | | 2(8+3b)=64 | | 6(1-4b)=270 | | x^3+5x^2+6x=12x | | 3(-2b-3)=-9 | | 4(9+b)=64 |