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)
-15 = x/3-7 // - x/3-7
7-(x/3)-15 = 0
-1/3*x-8 = 0 // + 8
-1/3*x = 8 // : -1/3
x = 8/(-1/3)
x = -24
x = -24
| -8x+10=18 | | 4(b-3)=b+25 | | 2n-4=5n+8 | | 3/5(2x+13)=3(4-3x)+6 | | -15(7x-4)-6x=11x-11-51 | | 9x+9=-18 | | 3x-7x+8=8 | | 5*(3-4)+2*6/2 | | 23=4x+11 | | -8t-(23)=-15 | | x+(5x/100)=270000 | | 3(x-7)-3(x+2)=1 | | 7n+2(2(1-n)-2(1+n))=14 | | x+5x=270000 | | .4x+5.8=4.4 | | 5(6t-2)=50 | | x^2/2-11*x=11 | | x/5+16=21 | | 3y+7=24 | | 30+25x=130 | | -8x+10=8 | | 5n+2(11-n)=5 | | 5-8b=1 | | (7+3i)(7-3i)= | | 2x+2=-7 | | 4+4(2p+4)=3(p-5)+5 | | 6+n/5=-5 | | 3+3(k+3)=6(k-2)+12 | | x/4+3/4=x/2+1/12 | | 6x^3+16x^2-1=0 | | x/2-9=-18 | | 20=3x+11 |