If it's not what You are looking for type in the equation solver your own equation and let us solve it.
p in (-oo:+oo)
p/3 = -81 // + 81
p/3+81 = 0
1/3*p+81 = 0 // - 81
1/3*p = -81 // : 1/3
p = -81/1/3
p = -243
p = -243
| 8x-2(4-x)=4 | | 16x^2+16= | | -0.67(1k+0.4)=.83 | | [9(n+4)-19]-2[(n-4)+3]= | | 87=3(r+8) | | 6x-3(5+2x)=15 | | 2x+3x+5+x-5=180 | | 6(2x-8)+3=12 | | 3m+8m+4m=-150 | | .5a+.75t+.6a+(-.5t)= | | -7x-(4)=-25 | | z^2-30=13z | | 24m=-96 | | x+3+7=2-7x | | -4(-3w-6)=12w+15 | | 4(3x-10)+8(x-2)=-20 | | 39=-11+5h | | 2y=-2x+12 | | 8=8x(1+blank) | | x-2-x=-2 | | 8m+3=4m+9 | | -3(2x+5)-3x+18=9(x+2) | | 30=2(x-6)+3x+12 | | 4y-16.3=52.1 | | w^2-40=3w | | -7-6x=x-14 | | 3x-8(6x+4)=18 | | (x^2)/1200 | | (M^6n)^-2/m^-8n^7 | | 5(x-3)+18=4(x+2) | | -75x^2+30x+24=0 | | (M^6n)^-2/m^-8n7 |