If it's not what You are looking for type in the equation solver your own equation and let us solve it.
Simplifying
163.28 = 3.14r2
Solving
163.28 = 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.
163.28 + -3.14r2 = 3.14r2 + -3.14r2
Combine like terms: 3.14r2 + -3.14r2 = 0.00
163.28 + -3.14r2 = 0.00
Add '-163.28' to each side of the equation.
163.28 + -163.28 + -3.14r2 = 0.00 + -163.28
Combine like terms: 163.28 + -163.28 = 0.00
0.00 + -3.14r2 = 0.00 + -163.28
-3.14r2 = 0.00 + -163.28
Combine like terms: 0.00 + -163.28 = -163.28
-3.14r2 = -163.28
Divide each side by '-3.14'.
r2 = 52
Simplifying
r2 = 52
Take the square root of each side:
r = {-7.211102551, 7.211102551}
| X/13=40 | | 5805.86=2r*3.14 | | 8-2(x-3)=2+x | | 3x-7y=25 | | f(x)=5x^2+7x-5(f+g)(x) | | 40(4.50p)=112 | | 14x^2+57x+30=0 | | 238.64=2r*3.14 | | x-(2/3)-(1/4)-50=70 | | 238.64=3.14*r^2 | | f(x)=5x^2+7x-5 | | x/20=12/5 | | 50.24=2r*4.14 | | 5x-5-2x+6=13 | | 15-4=21 | | 7(x+2)-3=15 | | 28-12=2(x-6) | | 4(3x+4)+5(x-3)= | | 3n^3=192n | | 72=l*w | | -4-3x=2 | | 100t^2+100t-2550=0 | | 4t=8(t-1/4) | | 5x+3z=66 | | 210(t-5)=41790 | | an=.5n+1 | | an=n-.5 | | 2xy=-6 | | .66(n-3)=8 | | 4x+2y=680 | | 0.04(2c-46)=-0.8(c-1) | | an=n+3 |