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)
(9/10)*x = (3/4)*x-7 // - (3/4)*x-7
(9/10)*x-((3/4)*x)+7 = 0
(9/10)*x+(-3/4)*x+7 = 0
3/20*x+7 = 0 // - 7
3/20*x = -7 // : 3/20
x = -7/3/20
x = -140/3
x = -140/3
| -2+5=y-1 | | 3(4x-3)-2=12x+7 | | 4n+2500= | | y*6+107=y*16-13 | | (9x/10)=(3x/4)-7 | | 1/9D | | 40-89d-80-4d+2+9d= | | 0.8(x+20)+0.8x=80 | | (10/3)(12/25)= | | (4n+5500)-(2n+5100)= | | (-10/3)(-12/25)= | | -5x+3(-2+x)=-5x | | -3F-7F+8.4=16.8 | | 5+3z-4=9z+6-5z | | x/25.6=8 | | 3x^2-3x-1= | | 9+10y=9+y | | -0.3=-S+0.6-8S | | 4x+5(4+x)=4x+40 | | 6y-4=16y-104 | | x^2-9+3(x+3)=0 | | x^2/0,08-x | | 3y+26=10y-51 | | 2y-1=y+5 | | (13b-2)-4(3b+2)=-7 | | 3/5m-1/2=4/7 | | 2n+400= | | (x+5)(2x+1)-(x-3)(x-5)=(x-3)(-(10x+14)) | | 3x+7y=285 | | =10x^2+2x-1243 | | 6*x+5*6=x-2 | | 2+4x=11+4 |