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)
-9 = a/15 // - a/15
-(a/15)-9 = 0
-1/15*a-9 = 0 // + 9
-1/15*a = 9 // : -1/15
a = 9/(-1/15)
a = -135
a = -135
| 12(d-2)=65 | | 2y+5y+25=4 | | x^6-2x^2+3=0 | | 18/30/3 | | (4x/7)-(x/2)=(13/14) | | -4x-4=17 | | -3.9+7.1+-7.8= | | -43g=25.8 | | -6(3x+4)=-18x+24 | | 2[d-(2d+20)+19]=2(d+1) | | a-6a=5 | | 3*(17-s)=18 | | 10(10x+12)-9=811 | | 7(3y-1)=-21 | | 2/3(4x-2)-3x=12-2x | | -7.1+-5= | | 3w+12=3(w+4) | | 2900-1000/9 | | -3t+6(t-1)=-11+2t | | 3(2x-3)-4(x+5)=3(x-8)+2(3x-1) | | 37-7x=8(-3-8x)-4x | | n=-n+m | | -4.7+5.7= | | (5+5x)= | | 2x+18=6(x+3)-4x | | n(n+5)+n(n+2)=n(2n+1)+n-45 | | 1.25x+12.5=2.5-3.75x | | 7v-9v=-6(8+6v)+7(1-v) | | -2/3x-1/6=x | | 24-(x+9)=4x-5 | | 44=2u+8 | | 2(c+a)=8a |