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)
(-1/3)*p = -81 // + 81
(-1/3)*p+81 = 0
81-1/3*p = 0 // - 81
-1/3*p = -81 // : -1/3
p = -81/(-1/3)
p = 243
p = 243
| 7x+16+9=76+2x | | -2-10=-20 | | y=-3(7)+1 | | 2x^2+8x-24=-936 | | 11x-6+8=90 | | X+2.5X=1.5 | | 2h=78 | | 4/5=17/x | | 2x-10=x+25+90 | | 18uw^4y^5-30u^8w^8=0 | | 2x^2+8x-888=0 | | 12=g+3 | | 10=w/5-10 | | x(3x-3)=60 | | -3=a-3-7 | | 5+65x=-8+19x | | 4u^9x^5y^8+24u^2x^6=0 | | 59=4v-9 | | Sin3/2 | | 14w=98 | | 5v^9w^8+25v^4w^6x^5=0 | | -6n-n=5 | | x^3-12x+3= | | k-k=-5 | | 0.8x/(0.5_0.3x) | | 2a-3b=22 | | -x^2-4x-9=0 | | 3ab-9ap+7ap= | | x-9x=2 | | -32.5=4 | | 8n-7n=-5 | | (4x+3y)+(2x-y)i=18-6i |