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)
(3/4)*A = -12 // + 12
(3/4)*A+12 = 0
3/4*A+12 = 0 // - 12
3/4*A = -12 // : 3/4
A = -12/3/4
A = -16
A = -16
| t^5-25th=0 | | 24+48x+42x= | | 3(-x)+x+2=2x+10 | | (y+4)(y+4)=(2y+5)(y+6) | | X^2+13*36=0 | | x+86y=6 | | 21x^2+13x+2=0 | | 2x+(-x)+5=2x | | 8(6x-3)=4x | | x^3+12x^2+21x+10=0 | | 4+b=-12-1 | | 14a-12b+6c= | | 6-8x=11x | | -3p+6+4p=12 | | x+x+6=20 | | 2x+6x+x-3=0 | | -3p+6+4p=13 | | -2x=-4x+20/2 | | -8=7x+2/5 | | 21/4+63/8 | | -13+13=4+h | | 20x+60y-100= | | 5x+20(x-8)=315 | | -2+6-4=-5a+6a | | 68=9/5+32 | | 3=2c+2b+a | | 3x-4=14x-40 | | 3=2a+2b+c | | 56x+42= | | 4x+5x+3x= | | 2+4w-3w=4-3 | | 100+40z= |