If it's not what You are looking for type in the equation solver your own equation and let us solve it.
21b=672
We move all terms to the left:
21b-(672)=0
We move all terms containing b to the left, all other terms to the right
21b=672
b=672/21
b=32
| -2x+7=4x+6 | | t/13=27 | | 3(n-5)=-n-20 | | 3x+2-4(2x+3)=12 | | r-922=768 | | 13-(4+h)=3h | | 39=6(v+6)-3v | | r-922=-768 | | 13=3(y-5)+4y | | 9(w-4)-7w=5(3-2) | | 2z-1=-9 | | x(x+2)-13(x+2)=0 | | 9-x=4x+1 | | -10(x+15)+3x=39 | | 12=w/27 | | -1=3(u+5)-7u | | 49/x=31/2 | | 6-x=-3x-2 | | (a+30)/7=3 | | 520-p=47 | | 7x^2+42=98 | | 6x+11=4x+27 | | 6y+154=5y+48 | | 3(x+3)-2=6x-3(-3+x) | | r4+ 12=8 | | 5x+30=1105 | | 11x-5=4x+65 | | 4u+9=13 | | 8x/3-2x/3=-13 | | 5p-1224=p22/5 | | #(x-1)/2=3(x+3)/6 | | a÷6+1=13 |