If it's not what You are looking for type in the equation solver your own equation and let us solve it.
3=-9r
We move all terms to the left:
3-(-9r)=0
We get rid of parentheses
9r+3=0
We move all terms containing r to the left, all other terms to the right
9r=-3
r=-3/9
r=-1/3
| m÷3.54=1.5 | | 1.16x=3.48 | | -10+-4x=50 | | 3x-10=20-2x | | -4-15x=101 | | -6x3/5+5=53 | | 2/3(n-5/6))=2(1/2) | | 7x+5=-6(x+10) | | x−5=−7x+11 | | 5a-2=16 | | 9x-1=3(1+2x) | | 4-10=x+3x-2x | | 4(2+x)=5(x−1)+5 | | 19x^2-8x-3=0 | | -6=-5y | | 9=2y-9 | | -3y=8 | | 4(2-4a)=-72 | | 5a+6+2a=17 | | 6-(1+3a)=-13 | | 3(y–54)=57 | | 5x+-4+3x=36 | | 3(3x+2)=2(2x+6) | | (2/5)+(7/x+6)=(9/(5(x+6))) | | 6+a=7 | | 2/5+7/x+6=9/5(x+6) | | 1/3+3k=70 | | (2x-5)^2=-9 | | 11x+33=15x+512x+4=13x-56x=4(x+5) | | 5x+2=29-4x | | 1/2(8x-4)=26 | | -6-4x+9=11+3x+6 |