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)
(1/4)*x-((7/8)*x) = 30-75 // - 30-75
(1/4)*x-((7/8)*x)-30+75 = 0
(1/4)*x+(-7/8)*x-30+75 = 0
45-5/8*x = 0 // - 45
-5/8*x = -45 // : -5/8
x = -45/(-5/8)
x = 72
x = 72
| 2a-6= | | -2x^2-16x-32=0 | | x+3iy+i(2x+iy)=5 | | -35+15=-4x+8x | | 183-10x=10x+17 | | 2x-1=27 | | 20x+10y=5 | | 8y+(-9)-4x+1-4y+2= | | -1.6=-0.5u+0.3u | | 20x-10y=5 | | x/5+5=20 | | 0.6=15z | | 2z=1.6+0.8 | | 12x-10=13+9 | | 13/13 | | 4x+2a=2x+7 | | 5/6x=5/5 | | -0.7x=-49 | | 2x+7=70-9x | | -(6y+2)-(-5y-7)=-1 | | 3x+8=-28-9 | | 58-4x=5x+18 | | p=33-18*12420 | | 2/x+1=x+1/2 | | (24x^5/6x^3)^2 | | 12(4x-2)=4(12x+3) | | x^2-45x+37.4=0 | | 8+19n-6=6n+50-3n | | -3p/3 | | -16-5x=11-8 | | 33p-18d=495 | | 4c/5-3c/5+1/5=-2/5 |