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)
3*(x-0.8) = 15*x+(16/7)*x // - 15*x+(16/7)*x
3*(x-0.8)-(15*x)-((16/7)*x) = 0
3*(x-0.8)-15*x+(-16/7)*x = 0
3*(x-0.8)-15*x+(-16*x)/7 = 0
(3*7*(x-0.8))/7+(-15*7*x)/7+(-16*x)/7 = 0
3*7*(x-0.8)-15*7*x-16*x = 0
-84*x-16*x-16.8 = 0
-100*x-16.8 = 0
(-100*x-16.8)/7 = 0
(-100*x-16.8)/7 = 0 // * 7
-100*x-16.8 = 0
-100*x-16.8 = 0 // + 16.8
-100*x = 16.8 // : -100
x = 16.8/(-100)
x = -0.168
x = -0.168
| (7c-5)(7c+5)=0 | | 49+(x+3)=90 | | 3b-4.4=2.6-6b | | 3b-4.4=2.6-6b | | 1x-5=1 | | a^2+4a+12=0 | | b-3b=2 | | 5(2+x)=4(x-2) | | 12x/18=36 | | 7y-2(6y+29)=-28 | | ln(5x-3)=0 | | -x/5-1.2=6.6 | | 2u^2+u+6=0 | | (2x+5)/(x-8)+(x+13)/(8-x) | | 9.95+.30s= | | 7-1/4=9 | | 8x-(x-21)=7(x+3) | | 1/3-3=-3 | | 3/2-5 | | 4y-7(3y+12)=-67 | | 12m=3m+10 | | y=2+14x | | 2/3(x-9)1/3x=7x-15 | | X(x-3)+4x-3=8x+x(3x+x) | | 3/n=9/3 | | x+26=2x+40 | | 3/2-1 | | 2y+8y=16 | | -2=4n | | ((x^2-36)/(x^2-2x-24))*((x+4)/(x)) | | y=9x+5x+2 | | -6+-5= |