If it's not what You are looking for type in the equation solver your own equation and let us solve it.
u=2u-39
We move all terms to the left:
u-(2u-39)=0
We get rid of parentheses
u-2u+39=0
We add all the numbers together, and all the variables
-1u+39=0
We move all terms containing u to the left, all other terms to the right
-u=-39
u=-39/-1
u=+39
| 4/n=20/65 | | 2x+3x+7x=36 | | 5(a-1)=-(-6a-2)-1 | | 34+6b=4b+14 | | -(p-4)-8=-2(p+8) | | r=5-0.8(6.25-1.25r) | | -6(1-3k)=2(5k+5) | | -4(1-3n)+n=-82 | | 2/n=10/26 | | C=8(2,400/x)+10x | | 9x-16=6x+7 | | b=6.25-1.25(5-0.8b) | | 7y^2+4y-8=0 | | 2b+8÷5=-12 | | 161=7(3a+8) | | 3x^2+24x+34=0 | | 2(x+3)−3(4x−5)=−9 | | 1.6b=10 | | 9^2x-1(3^3x-1)=27^x+3 | | 12=(x+Y)(2) | | 4x-7(1+5x)=86 | | b=-73=-58 | | 2(7+3v)=5(v+6) | | y+-26=70 | | 17x-13=27-3x= | | G²+4g=21 | | 3m+2=11 | | j÷8=4 | | -1/2(p-4)=2 | | 10a+136=-8-2a | | 10000000000=100x+9867 | | 18m=2m^2 |