If it's not what You are looking for type in the equation solver your own equation and let us solve it.
21z=5.187
We move all terms to the left:
21z-(5.187)=0
We add all the numbers together, and all the variables
21z-5.187=0
We move all terms containing z to the left, all other terms to the right
21z=5.187
z=5.187/21
z=4.3698399326032/17.691659646167
| (2x-11)=57 | | 11-6x=-3(x-1)-x | | 27-x=21-4x | | 5(x-8)-5=-45 | | 7x-11=9x+7 | | x-15x=28 | | 8x+5=5x+3x+2 | | 8-(-x+6)=-10-x | | 4n+3-7=16 | | 8x-2x-10=2x+6 | | -6y-y=12-16 | | X/20+x=6.25 | | 4x+3=12x+83 | | 1/8=s-3-4 | | -2.4+y/7=-19.9 | | Y=2x+10x+8 | | -(5+4x)=-5-3x | | 3(2x+5)=5x7 | | 4n+7=-25 | | 27y3=3y | | 10-4x=-6x=30 | | 34=-4(1-9f)-2 | | 9=(3/8)a | | 90+2x+3x-10=90 | | y/3+4.4=-3.1 | | (8(4w+7)/3=1 | | -5g+2.2=17.8 | | 13x-22(8+5x)=12-11x | | 12x-12=4x-20 | | 34=-4(9-f)-2 | | 0.5x-10=0.2x+4 | | 150+5x=130+3x |