If it's not what You are looking for type in the equation solver your own equation and let us solve it.
2+4S=21-0
We move all terms to the left:
2+4S-(21-0)=0
We add all the numbers together, and all the variables
4S+2-21=0
We add all the numbers together, and all the variables
4S-19=0
We move all terms containing S to the left, all other terms to the right
4S=19
S=19/4
S=4+3/4
| (x^2+3x+1)^2-2x^2-6x+1=2 | | (X)+(2x+4)+(x-1)=180 | | 2x+4+x+x-1=180 | | n*2/3n=9 | | n(n-3)=10n | | 3/7=m/84 | | 32800/(1800-x)=410 | | 9^x-7(3^x)=18 | | 543n=244n+225n | | 2(5)+3y=21 | | 21-2x=8x+4 | | 6p+19=17 | | 42a-64=24a* | | 4x=3(x+2)+4 | | 4x+32=170 | | x+4x+x+3=48 | | 2.5+3y=21 | | x+4x+x/3=48 | | 7y-8=6y+9 | | 9y+94=125 | | 2/3=6/5-x | | 2x5=13x=9 | | 2x-5=x=9 | | 2x+5=13x=3.5 | | 2x+5=12x=3.5 | | 2x+5=13x=4 | | 30+t2=16t | | 5+6n=23 | | x+x/20=15000 | | 3x/8=3x+16 | | G(0)=3f(0)-2 | | x^2-10x=79 |