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)
(2/5)*(3*x+9) = 2*(3-(3*x))+12 // - 2*(3-(3*x))+12
(2/5)*(3*x+9)-(2*(3-(3*x)))-12 = 0
(2/5)*(3*x+9)-2*(3-3*x)-12 = 0
2/5*(3*x+9)-2*(3-3*x)-12 = 0
2/5*(3*x+9)-2*(3-3*x)-12 = 0
36/5*x-12-12/5 = 0
36/5*x-72/5 = 0
36/5*x-72/5 = 0
36/5*x-72/5 = 0 // + 72/5
36/5*x = 72/5 // : 36/5
x = 72/5/36/5
x = 2
x = 2
| 0.5r-3.8=5.66 | | -6k+14=16k | | 5x-5=11x-7 | | 0.08y+3=3.8 | | 6x^2+5=389 | | 0.5a-0.3=5 | | -6x-8=2x+24 | | 15x+7=6x+7 | | x/7/8=4 | | 15/16=7/4(p+p) | | 2x+5/4=3x-5/4 | | 3x-1.2=2.8x-0.42 | | 12a-8=11a+3 | | 0=x^2-16x+60 | | (9p+q)(9p-q)= | | (8+v)(3v+5)=0 | | 5a-5=4a+4 | | x^2+3x+13=-6x-1 | | x^2+3x+13=-6-1 | | 0=3h^2-76h-5415 | | 4xy+12xy-xy= | | x+(x+4)=8 | | 4.4+t=4.5 | | 4+5+7+8+2+5+9+8+7= | | 4+5+7+8+2+5+9+8= | | (x-2)/4-(x+5)/6=(5x-2)/9 | | -3/4y=-9/20 | | ax+bx=l | | 50/25 | | (3x+15)/15 | | 3x+15/15 | | 6(3x-4)=-4x+11 |