If it's not what You are looking for type in the equation solver your own equation and let us solve it.
a in (-oo:+oo)
(5*a)/6+(3*a)/4-(7/12) = -13/2 // + -13/2
(5*a)/6+(3*a)/4-(7/12)-(-13/2) = 0
(5*a)/6+(3*a)/4-7/12+13/2 = 0
19/12*a+71/12 = 0 // - 71/12
19/12*a = -71/12 // : 19/12
a = -71/12/19/12
a = -71/19
a = -71/19
| 6/5+4x=9/5-5x | | X^2-6x-9=-2 | | (3r-12)=0 | | (4x^3-9x^2+9)=0 | | 3x-14x+25=6x-12 | | 12m^2-13m=0 | | 5p-6q=10 | | -2x-13+5x=-3x+11-2x | | T^2-3t-5=0 | | (6x^3+x^2-4x)(9xy)= | | x^2+3x+4=58 | | 80+78=158 | | 6x+5xy+8y=0 | | -2x-13+5x=13x+11-2x | | (9m^3+7m)-(.5m^3-4m+4)= | | 15x^4+35x^3-100x^2=0 | | x+x-v+v=w | | 7c^4(4c^6+d^4+d^2)= | | 27/45-10/45 | | 3y^2+5y=0 | | x^2-6x+x-2=96 | | 17x+-12=114+-3x | | 5x^2/(x-2)^2(x+2)^2 | | (m)/2-1=-3 | | 153-6x=9-8x | | 2Iny=Ine^2-3In | | 5x^2-(5/4(x^2+4x+4)+5/4(x^2-4x+4)) | | 136.27+23.50w=253.77 | | 8x-4*1=8 | | 8*1-4y=8 | | 2+5x=7+3x | | 5/4(x^2+4x+4)+5/4(x^2-4x+4) |