If it's not what You are looking for type in the equation solver your own equation and let us solve it.
-80=4r
We move all terms to the left:
-80-(4r)=0
We move all terms containing r to the left, all other terms to the right
-4r=80
r=80/-4
r=-20
| 5/10=4n | | 5z=4/2 | | 6q+10=16 | | 40-x=76 | | 18.9=x+16.4 | | 26=2k | | 2+6y=–8+7y | | -90=z-20 | | 6d+2d+7=–9 | | 9.5=x5 | | s+2/3=7 | | 5(v-5)=-3v+7 | | 4x−13=7x−34 | | X^2-9n+18=0 | | 27.75=12+3b | | 65=x-23 | | 57-2+7x=111 | | 3√5x+2+8=11 | | b/13=4;b=52 | | 6*n=56+(-n) | | b/13=4;b= | | $27.75=$12+3b | | b/13=4; | | n-24=3*(-n) | | -3(2x+2)=3+3x | | 50/x=-25/2 | | 9/5=8a/8 | | 4(1+3k)=52 | | x6−2=2 | | s+14=21 | | 3q+1≥7=q | | 3n–(n+8)= |