If it's not what You are looking for type in the equation solver your own equation and let us solve it.
3*9+13=z
We move all terms to the left:
3*9+13-(z)=0
We add all the numbers together, and all the variables
-1z+40=0
We move all terms containing z to the left, all other terms to the right
-z=-40
z=-40/-1
z=+40
| 69-n=19 | | 41+69x+1=180 | | 5×-24-11x=3×+24+3× | | 5x-5=3x13 | | F(x)=-4+15 | | 4*19+38=z | | 17.3=2y-8.3 | | 95+32x-1=180 | | 39=2x-5(-3x+13 | | X×(x+2)=528 | | 5(6n-2)=8n+1+2n | | c=89−53 | | 1750−250x=1000 | | 216^3-3x=36 | | 3/5y=27/8 | | 105+76x-1=180 | | 7(x+2)-(42)=0 | | -2u=2 | | 7+b+2=3 | | 7(x+2=42 | | 4n+5=3n+3 | | 2x+1-23=180 | | 216^-2n=6^2 | | 2x+9-23=180 | | (2/3)^x=36 | | 2x+9+23=180 | | -10x+x-18=16 | | -6+7(-4x+4)=-90 | | 2x5=+12 | | -8x+6=-5x-9 | | (5/6)x-(1/3)=-2 | | d=10(8) |