If it's not what You are looking for type in the equation solver your own equation and let us solve it.
0.21x=8
We move all terms to the left:
0.21x-(8)=0
We move all terms containing x to the left, all other terms to the right
0.21x=8
x=8/0.21
x=38+0.02/0.21
| 3z/10-6=8 | | (10)1/4(20-4a)=6-a | | (9)1/5(4+y)=y | | (8)1.2(3x-5)=1.5(2x-4) | | (7)0.04(x-5)=0.2(10-13x)+x | | 30y-3=68 | | X/3+2=x+2/3 | | x+x*0.12=10000 | | X/3+1=x+1/3 | | 0.2^-x=1/0.15 | | (4)3p-8=13-4p | | (3)4n+5=6n+7 | | -4/3=g/1.5 | | x+x*0.18=10000 | | (2)51x-56=44x | | 23×x=-437 | | (x-5)(x-6)=120 | | 2x+6-7x=8+5x-12 | | (5x+8)=(5x+8) | | 10x(2)-19x+6=0 | | 3x-5=403x-5=403x-5=40 | | Tn=n2−5n+4 | | -1/3x-2/3=4/3x-1 | | 2y+9=4y-13 | | 4h+3=13 | | 8h-27=57 | | 0,8(2u-3)=(2u+4)×0,6 | | 39+x=144-2x | | 8x+23=3x+103 | | 9-3(4-11)=(5x-12)x6-12 | | 6x^2+3x=11 | | 7b+10-6=15b+10 |