If it's not what You are looking for type in the equation solver your own equation and let us solve it.
19-r=7
We move all terms to the left:
19-r-(7)=0
We add all the numbers together, and all the variables
-1r+12=0
We move all terms containing r to the left, all other terms to the right
-r=-12
r=-12/-1
r=+12
| 2x+3+45=135 | | (5a-2)/3=1 | | 3(-2-3x)=-7x-4-2x | | 4/7=n/64 | | (11)/(18)x+(5)/(9)=(5)/(9)x | | u/2−8=-6 | | -4x+7=97+5x | | 9x−102=−8x | | -1-2x=-3x-7 | | e+55+35=180 | | 4x+25=2x+85 | | 5x-2x=1x+10 | | 8.6x+4.4x+11=54 | | 55x+35=180 | | -1+4x=5x-8 | | 8x-3x+2=2x+20 | | 3=h/3+6 | | 35x+55=180 | | 3=h3+ 6 | | k/3-k/5=6 | | -y+208=269 | | -6x+1=-2x+17 | | 3(2x-1)+x=x-2 | | 3·y=32+y | | 4x-3=-27+6x | | 83=188-y | | 9g+5(g-1)=-11=12g | | 10+7x=-3x-100 | | 3x-5(x-3)=-2+5x-3 | | 2g+7-10g=16 | | 35=-y+188 | | 4+6x=2x-20 |