If it's not what You are looking for type in the equation solver your own equation and let us solve it.
21=x13
We move all terms to the left:
21-(x13)=0
We add all the numbers together, and all the variables
-1x^13+21=0
We do not support expression: x^13
| 9(m-3)-8(m+1)=-35 | | 8x-4+6x+30=180 | | 146=6x+26 | | 4(x-2)(x-2)+320=0 | | x/4=x/7+7 | | 17-12=x-6 | | 24-7x=25 | | 60-x/8=x/7 | | -3.9x=63.18 | | 3k2-14k+4=-4 | | (X+17)+(x+35)+(x+42)+x=360 | | X^2=-8x+29 | | -2x(13x-3)+9(3x-6)-9=8-9 | | 7x=300+x | | -5/8+u=1/4 | | 24=4+3+b | | 78+20n=350+20n | | 7x+10=31+4x | | 60-(x/8)=x/7 | | -32-3/5f=75 | | |6b-3|=21 | | 1/9y-6=-13 | | 12x-(3x-12)=7+8x | | (7y+8)-(7+6y)=5 | | 1/3y-4=-13 | | 8(n-2)=-40 | | 20q2+19q+7=4 | | 7(x+2)-(6x-5)=-2 | | M/4=m/7+7 | | x+1/x-1=3x/3x+6 | | 2.25(9x-4)=-2+10x+12 | | 40-4x=-2(-3x+10) |