If it's not what You are looking for type in the equation solver your own equation and let us solve it.
Simplifying
7r2 = 30
Solving
7r2 = 30
Solving for variable 'r'.
Move all terms containing r to the left, all other terms to the right.
Divide each side by '7'.
r2 = 4.285714286
Simplifying
r2 = 4.285714286
Take the square root of each side:
r = {-2.070196678, 2.070196678}
| 9x-3(x-3)=6x+3 | | 5x+2=47 | | x-6+2x=18 | | 2x^2+x-1=9 | | 3.6=9c | | 3*0-2(x-3)-1-11-21=4x(2-0)-7x | | 2x-4x=22 | | 5x+6y=5(x+y) | | -10+6g=110 | | 3-4x=-4-2x | | 6+3=-7 | | -3f+14=-7 | | 55+11h=240 | | 57=6M-3 | | 3a+11=8a-24 | | 2x^2+16x=20 | | 9y-y= | | x(-3)=21 | | 6h+4=24 | | -3a+5=2 | | -4r+-8=8-16r | | 5x+20=5x+20 | | 7h+15=80 | | 4.3t-4-.2c=-9 | | 6p+4=46 | | 5-6x=11+2x | | 3x-2=2x-3 | | 11=t-2.2 | | 0.666x+4-5=0.666+1 | | -3(2s-4)-12=-3(5s+3)-5 | | 8-5x=-12 | | -(h+7)=-8h |