If it's not what You are looking for type in the equation solver your own equation and let us solve it.
11-r=13
We move all terms to the left:
11-r-(13)=0
We add all the numbers together, and all the variables
-1r-2=0
We move all terms containing r to the left, all other terms to the right
-r=2
r=2/-1
r=-2
| 20-10y-10y=20 | | 6-3q=20-q | | 3/4k-7.5=7.5 | | 3.5n+2=3n+10 | | 2a+10=160 | | 2(x-1)=-9x-24 | | 2x+36=9(x+4)-7x | | –9+9u=8u | | 1/2+8d=18 | | 2x+1+5x+5=180° | | -v-8=4v+7 | | 6(x=15)=-102 | | 10x+2=-2x+58 | | -5/6s=3 | | -x=4x-9=8x+6 | | 9=x/3+x/7 | | 8-3n=-5-n-7 | | 7(2+m)=98 | | 14h-9=13h+3-h | | -5/8s=4 | | 9X+25y=523 | | -19s=17-18s | | 6=b-30 | | 29=7x+5−4x | | 2b+7=10+b | | 37+10m=7.12 | | -9+8g+1=10+10g | | (x+1)-8+2x=-32 | | -4/5s=7 | | -10(n-5)=-90 | | 9m+9=8+7 | | 2t-9=-4t+9 |