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)
(4/5)*x-5 = 7 // - 7
(4/5)*x-7-5 = 0
4/5*x-12 = 0 // + 12
4/5*x = 12 // : 4/5
x = 12/4/5
x = 15
x = 15
| 75d=-324 | | -2x-54=96-12x | | 3x+27=327 | | x^3+57x-30x^2=38 | | -4(3x)=b | | 3m^2-21=0 | | 45-6x=25.50 | | 3y+5x=65 | | 2x-7=43.6 | | 4x(n+1)=32 | | 2x-9x-62=120 | | -87=3+10x | | (x+9)=-16 | | 2n-40=2n+25 | | d=a-b/c-b | | x^3-12X^2+24x-16=0 | | -x^3-57x+30x^2+38=0 | | 4w^2=70 | | a-b/c-b | | -4(x+9)=32 | | 3/4(4x+8)=12 | | 1/2x-26=15 | | 5b(a+6)+3(a+6)= | | 2(6a-7)=10 | | 394(34x+1)=23(12x-3) | | 2x+8-3x=4(x+1)+29 | | -24x+x+3=0 | | 7x+13=2(2x+5)+3x+23 | | 5u-18=2(u-6) | | 4c-2c=20 | | -2+72n^2=0 | | (x+14)(x+4)=14(x+22) |