If it's not what You are looking for type in the equation solver your own equation and let us solve it.
Simplifying
642.0986 = 3.14r2
Solving
642.0986 = 3.14r2
Solving for variable 'r'.
Move all terms containing r to the left, all other terms to the right.
Add '-3.14r2' to each side of the equation.
642.0986 + -3.14r2 = 3.14r2 + -3.14r2
Combine like terms: 3.14r2 + -3.14r2 = 0.00
642.0986 + -3.14r2 = 0.00
Add '-642.0986' to each side of the equation.
642.0986 + -642.0986 + -3.14r2 = 0.00 + -642.0986
Combine like terms: 642.0986 + -642.0986 = 0.0000
0.0000 + -3.14r2 = 0.00 + -642.0986
-3.14r2 = 0.00 + -642.0986
Combine like terms: 0.00 + -642.0986 = -642.0986
-3.14r2 = -642.0986
Divide each side by '-3.14'.
r2 = 204.49
Simplifying
r2 = 204.49
Take the square root of each side:
r = {-14.3, 14.3}
| -5(12y/11) | | -4y=20-4x | | -5(27/11) | | 5-2/76 | | -(-1+n)=15 | | x=bc/t | | (5+y)+2=-1 | | 25v-vx+5x-5v^2=0 | | -64p=12 | | -11=7-c | | -6x+5y=-24 | | Ln(x+19)=lnx(7x-8) | | 4x+18-3x=-5-11 | | 79y=26(3y+12) | | 8x+4x+3+8=9x+3+2x | | -5x+7y=-3 | | 3c+a=64 | | (5x+y)+(8x-3y)= | | 3/5:35 | | x^4-4x^3+6x-16=0 | | -3=1-5k+3k | | (29)-1/2 | | 10.00= | | -12*0+6y=50 | | 1.2x+0.3=0.9x+(-1.5)+8 | | -9(z-7)3Z-9= | | -2-3x=4 | | 15x+27=20x | | 6w-11w=-35 | | x^(6/5)=5 | | 9n+n+7n= | | 16=144 |