If it's not what You are looking for type in the equation solver your own equation and let us solve it.
3x=621
We move all terms to the left:
3x-(621)=0
We move all terms containing x to the left, all other terms to the right
3x=621
x=621/3
x=207
| 41+5w=-5w+-9 | | 100=16t2+48t+64 | | -8c-60=3c+-5 | | 6x=-7x-78 | | 2(-1x+7)=14 | | -6c-6=21+3c | | 2(4k+3)=3(1-k) | | -8y=16-4y | | 3y+-9=2y-1 | | -4k-4=-69+9k | | 2x+(400/x)=P | | 112+8w=-8w | | 8(r+4)=4(r+2 | | -4c+2=12-9c | | 5(8+x)=-5 | | 5(8+x=-5 | | 3x+1=12x-4 | | 8p+11=99 | | 4u−4=12 | | 12=4(u=4)-6u | | x/3.9=1.6 | | -2c+-3=-7c-48 | | 3x+1=14x-4 | | -4(5+x)=-48 | | -9p=-60+3p | | -4y=4y+24 | | -2x+-8=-48+8x | | 7x-1/2x+7=2x-20 | | -4×-7=n×-4 | | (1/2x^2-20)^3=-8 | | 6j-9=-2j+7 | | 4x+1/7=2x-1/3 |