If it's not what You are looking for type in the equation solver your own equation and let us solve it.
D( x )
0.1-(0.75*(1-x))+1 = 0
0.1-(0.75*(1-x))+1 = 0
0.1-(0.75*(1-x))+1 = 0
0.1-0.75*(1-x)+1 = 0
0.1-0.75*(1-x)+1 = 0
0.75*x-0.65+1 = 0
0.75*x+0.35 = 0
0.75*x+0.35 = 0
0.75*x+0.35 = 0 // - 0.35
0.75*x = -0.35 // : 0.75
x = -0.35/0.75
x = -0.46666667
x in (-oo:-0.46666667) U (-0.46666667:+oo)
1/(0.1-(0.75*(1-x))+1) = 2.375 // - 2.375
1/(0.1-(0.75*(1-x))+1)-2.375 = 0
1/(0.1-0.75*(1-x)+1)-2.375 = 0
0.1-0.75*(1-x)+1 = 0
0.1-0.75*(1-x)+1 = 0
0.1-0.75*(1-x)+1 = 0
0.75*x-0.65+1 = 0
0.75*x+0.35 = 0
0.75*x+0.35 = 0
1/(0.75*x+0.35)-2.375 = 0
1/(0.75*x+0.35)+(-2.375*(0.75*x+0.35))/(0.75*x+0.35) = 0
1-2.375*(0.75*x+0.35) = 0
0.16875-1.78125*x = 0
(0.16875-1.78125*x)/(0.75*x+0.35) = 0
(0.16875-1.78125*x)/(0.75*x+0.35) = 0 // * 0.75*x+0.35
0.16875-1.78125*x = 0
0.16875-1.78125*x = 0 // - 0.16875
-1.78125*x = -0.16875 // : -1.78125
x = -0.16875/(-1.78125)
x = 0.09473684
x = 0.09473684
| x^2+10x+0=576 | | 7+2r=1+6r | | 12+10x=9x+20 | | 5x+25/15 | | 12/5/4/15 | | 4m+2=3m+8 | | P^3(36p^2q^8)^1/2 | | 3y=y+4 | | 6(t-2)+8t=7(2t+5)-10 | | -4/-4+13/-4= | | 164*13/41*13/16 | | 6x^2+19x+20=0 | | X^2=6+9 | | 42-4x=5x+18 | | (-9/4)+3.5 | | 9x-3=4x+28 | | y-130=-5.75(x-0) | | x-8.9=-5.6 | | 9(1)-3=6 | | 5(u-3)-2=10(3u)+4(2u+1) | | e^7x=8 | | 3,5/4=8,4/n | | 1+4(x+-5)=0 | | 2x-4=-1-5 | | 3x=5x-28 | | 2x-4=3-5 | | C(b^2-16)+x(b^2-16)= | | X=99+347 | | 3abx^2-6x=0 | | 4x+3=2y-3 | | 2x-3=-x-27 | | 6m-9=19+2m |