If it's not what You are looking for type in the equation solver your own equation and let us solve it.
-15=5r
We move all terms to the left:
-15-(5r)=0
We move all terms containing r to the left, all other terms to the right
-5r=15
r=15/-5
r=-3
| 12x+5+11x=180 | | 103-10x=7 | | n(n-1)=462 | | 5(2x+1)=3(x=4)-5 | | 462=n(n-1) | | 5(11x-18)=3(2x=7) | | -3x+5=12+4x | | 10x=15/20 | | 36+t=75 | | 3.2+x=10 | | 12u=240 | | 238-x=284 | | b/10=27 | | 4x+1=1/2(150-60) | | x-72=20 | | 2(34x+2)=140 | | 56x=693- | | 7y+10=3y+12 | | 2d-1+17+14=55 | | 7x-8=-10+1 | | e/3-8=-2 | | 3c=120 | | (2x-4(2x+3=24)) | | 2x^+10x-150=0 | | 4=5p | | 14(0)+11x=-11 | | 7a-3=5+5(a-8) | | 15=x*0.15 | | 0.3x-0.5=1.7 | | 47=x/(0.8-2x) | | -4x=-23-7x | | 17+4x=-x |