If it's not what You are looking for type in the equation solver your own equation and let us solve it.
9r(r)-25=0
We move all terms containing r to the left, all other terms to the right
9rr=25
r=25/1
r=25
| 7+0.20y=y | | 532/1007=x/1280 | | -17=1+4v+2v | | 15=5-6f | | 12=-6(x+4) | | 16=-2(-2x-1)=2 | | -4t+5=-2t-1+4t | | 3x+5.5=-05 | | 0.82=2x-0.58 | | -2=-6y+4y | | 3r+1-7=-3 | | 6-5(2b+6=-24 | | 7(4x-5)-27x=7 | | 10x+20=12x-40 | | 8g+10=-8+2g | | 3(x+1)=2x+8+x | | 8+16x=2+17x | | -1x=-12 | | 2(8*6+8w+6w)=208 | | 6x+3x=5 | | 2x+1/4=3/4x+16 | | 4=7-p | | 3=f-3 | | -17+2=-5(x+6) | | 11-y=-12 | | -69=5x | | 7(-1+4x)-12x=5 | | 7x-3=7x+0 | | 3(1-3g)=-7+7g | | h/3=3.8 | | 17/1=x/3 | | 3(1-3g)=-7+7 |