If it's not what You are looking for type in the equation solver your own equation and let us solve it.
u in (-oo:+oo)
9-((4/5)*(u-3)) = 1 // - 1
9-((4/5)*(u-3))-1 = 0
(-4/5)*(u-3)-1+9 = 0
9-4/5*(u-3)-1 = 0
9-4/5*(u-3)-1 = 0
7/5-4/5*u+9 = 0
52/5-4/5*u = 0
52/5-4/5*u = 0
52/5-4/5*u = 0 // - 52/5
-4/5*u = -52/5 // : -4/5
u = -52/5/(-4/5)
u = 13
u = 13
| 30x+120= | | Y+2+2y+2+2y-2x+y=0 | | 40b+13=40b-86 | | 5(x+2)=6(x-8) | | 9x-3+12x+12=180 | | 15=4x-(7x-3) | | 2x-1=3x-17 | | 15=5u-25 | | 60s^2+39s-45=0 | | 0.11y+0.03(y+6000)=1300 | | 15+6y-6y=4y-1-6y | | -2a+6=30-5a | | 3(t-1)=7+t | | 8f/12-3/12=1/3 | | 5/2d-3/2=4/5 | | 2x-15=4+5x | | 2x^2+4xy+2y^2=8 | | -9x+12+4(3x+3)=7(X-2)-4x+14 | | 42=-2-7x | | 0.06(2t+1)=0.12(t+5)-0.54 | | -18=12+3u | | 2(z-6)=4 | | 8c-7=7c+7 | | 7/5-3n/10=1/5 | | 10-7x-3x+6= | | G=8/3(p-19) | | -b-1(13+4b)=-3(5-9b)+2 | | -3y+8=2y-2 | | N=-1225-1 | | 34.7-0.025=27.7+0.375 | | 9x-2=4x+7.25 | | 3x+12=4(x+3)-x |