If it's not what You are looking for type in the equation solver your own equation and let us solve it.
15r=195
We move all terms to the left:
15r-(195)=0
We move all terms containing r to the left, all other terms to the right
15r=195
r=195/15
r=13
| 5x-16=8x+68 | | -2n-2=38 | | | | u/23=25 | | 2.10x+5=49.10;10 | | 10(2x-5)=5x+25 | | | | -5x+6(-5x-4)=-199 | | 2+23=2x | | -30+x+18+4x=10x-4-9x-20 | | 28f=532 | | O.5y+20-0.5=13 | | | | -13x+24+7x=2(-3+12) | | 96=8(4+c) | | 6x+4-2=7x+2-x | | -3-9f=24 | | 2=k/10 | | 8(4+c)=96 | | -4+2/g=6 | | 7.5z−2=8.5 | | 2x+3-4x=-2x+8-5 | | -5(3-r)=26 | | -2x+12x-3=47 | | 144+400=c2 | | 3n+1=5n-13 | | 11(w+10)=264 | | 7+a/4=14 | | 3b-(-3)=6 | | -(51)-17=c | | 12=3+2n | | 10-x=2x+4 |