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)
(-7/8)*x = -21/64 // + -21/64
(-7/8)*x-(-21/64) = 0
(-7/8)*x+21/64 = 0
21/64-7/8*x = 0 // - 21/64
-7/8*x = -21/64 // : -7/8
x = -21/64/(-7/8)
x = 3/8
x = 3/8
| 56/2 | | y/13=60/156 | | 24x^2+6x-8=0 | | 8=-12z+14 | | -3-6x+4x=-13 | | 18/81=p/9 | | 9x=6x-33 | | 4(2v+1)=3(5v-8) | | -19=11x+(3) | | 19.95/139.95 | | 3x-1+5x=7x-4 | | 8+5y=7x | | x^2+12x+15=75 | | 5y+8=7x | | 35c+15=200 | | -4x^2+20x=25 | | 11x=8z-3(5-2x) | | 4x+2=-14-3x | | y/-7-0.5=-2 | | -7x-3+5x=5 | | q=8/7T+27 | | 6-6x=4x+66 | | 1/3B-2=7 | | 5+(x-1)=12 | | 1/5x+3/8y=1/2 | | 2g+4g=66 | | 8-4x=4x+-72 | | -4(x+1)+15x=15 | | 11+n=2n+18 | | 9+7x+4x=-90 | | 8-4x=4x+72 | | X/3=c |