If it's not what You are looking for type in the equation solver your own equation and let us solve it.
-20=2p
We move all terms to the left:
-20-(2p)=0
We move all terms containing p to the left, all other terms to the right
-2p=20
p=20/-2
p=-10
| 71=9r+17 | | 1/8(16n+24)=1 | | (24-2x)(18-2x)=247 | | -3c-10=-12 | | -5h=8(-6h-10)=-6 | | 21+9y=93 | | 125-75m+48,750=50,250-200m | | 7+2a=9a | | 4(2c-4)=8 | | 6x7=73 | | g/3-9=-5 | | 4x+10+12x-6=68 | | 8+3l=l | | -38.48=-5.2a | | -10=4c+-2 | | X^2+16x^2+256=0 | | 3(x-5-7=3x+8 | | d+4=18 | | 3.1a+7=13.82 | | (X^2)2+16x^2+256=0 | | 4=u-5 | | 3x+6=5x-2x+4 | | 27=¡8¿x | | 3z+4=23 | | p/20=29 | | X^4+16x^2+256=0 | | 17=-5x-18 | | 4l=28 | | 2/3(6x+9)=2(2x+3) | | 7(y+7)-11y=-23 | | 11-5p=11 | | -12+6x=8x |