If it's not what You are looking for type in the equation solver your own equation and let us solve it.
30b=840
We move all terms to the left:
30b-(840)=0
We move all terms containing b to the left, all other terms to the right
30b=840
b=840/30
b=28
| 6+5f=6f | | 13=28-3d+2 | | 22x+15-10x=37 | | x4+8=20 | | -z+11=9 | | q+23=845 | | −8+5a−5=−3 | | –5+3m=–2m | | C=50x+1800 | | 4×-7y=11 | | √(x+5)/2=0 | | 3(7x-7)=-126 | | 8x+6+2x+4=180 | | -2c-29=17 | | h-34=56 | | 708=t+670 | | 9w-10=136 | | n/9− 24=–21 | | 4x+3=7(3+x) | | 9w-16=136 | | -12x-15=3x^2 | | n9− 24=–21 | | –2=r–1 | | n-676=143 | | 3p-8=13-4p* | | 4(x-2)+5x=64 | | -(3c-2)=29 | | 24-2w=-2(w-17)-10 | | –6=–3t | | x×x+5x-7=0 | | 3x+5+6x-7=180 | | 8q=592 |