If it's not what You are looking for type in the equation solver your own equation and let us solve it.
13-2x=9(x=3)
We move all terms to the left:
13-2x-(9(x)=0
| 3x^2-31x+81=0 | | 4(x~2)=7x+1 | | 5n+3/5=10 | | 3x+4.5=6x-10 | | 1.5(2x+3)=6x-10 | | 9×27+2×31-31=n | | 4÷x=9÷(x-3) | | 8x+12=3x-4 | | 2x+40+5x-60+3x-80=180 | | 25.x=1225 | | (4c-12)-3(6-2c)=c+6 | | 5x=x10 | | 1/3(18+129)=6(2q.7)- | | 1.5x=25.x= | | x+250=3x+100 | | (40-(72/x))×x=21 | | 5x=x+300 | | 0.2*(x+44)=9 | | 0,5p+18=p-12 | | 16x-55-5x-13=90 | | 16x-55+5x-13=90 | | 6x+110=128 | | 90+(16x-55)=(5x-13) | | -4x-10=-5x-5 | | F(2)=3x^2+2x-12 | | F(-10)=3x-16 | | m²+3=51 | | m²+3=72 | | 7×-21-3x+13=7+6x-19 | | 4.9x^2+30x+80=0 | | 2^x=250 | | 1/x=3/1-x |