If it's not what You are looking for type in the equation solver your own equation and let us solve it.
21-p=7
We move all terms to the left:
21-p-(7)=0
We add all the numbers together, and all the variables
-1p+14=0
We move all terms containing p to the left, all other terms to the right
-p=-14
p=-14/-1
p=+14
| 10x+15=8-12x+4+6x | | 9^3x-2=27^2x-2 | | 1/8x^2-1/4x+15/4=1/16x^2+1/4x+1/2 | | 4y-7=5y-4 | | 5(2x+3)=4(2−3x)+2(2+3x) | | 535.5=70x | | -15x-19=-79 | | 2x+8+6x+4=180 | | 9a-4+3a-11)=23 | | -7(-6-(6/7)x)=12(x-3.5) | | -7q+8=-8+3q | | -2n-3(3-10n)=10n | | .5(8-x)=4-x | | (-1c+2)-(2+1c)=1 | | 2s+19=37 | | .5n+7=n+7 | | -11h=-12h-18 | | x+x=-37 | | -12=2h+.2(20-6h) | | 2^3x-6=8^x-2 | | 11x+4=3(1-2×)+1 | | -10-6c=10+4c-6c | | 8f+7=47 | | 4x+2/2=5 | | (-1c+2)-(2+1c=) | | f+5=-12 | | 8x-13=7x11+ | | 2.1=5y | | 8x-13=7x11 | | -0.3x+2.31=-0.5x1.91 | | 9u+10=9u+9 | | 2x-14+18=180 |