If it's not what You are looking for type in the equation solver your own equation and let us solve it.
r-8.4=-7.8
We move all terms to the left:
r-8.4-(-7.8)=0
We add all the numbers together, and all the variables
r-0.6=0
We move all terms containing r to the left, all other terms to the right
r=0.6
| y+5.2=8.17 | | 180-x=3(90-x)+30 | | y-1.53=2.41 | | w-7.9=4.88 | | 6+5n=18 | | 0.13x+0.18x=0.16 | | X(1x+25)=0 | | r-8.4=7.8 | | X(1x+24)=0 | | 5=x/31.25 | | 9(18x-9.5)=-16.5+8x | | -3|2.2x-3.3|=-6.6 | | r-8.4=7.6 | | y-56+y=180 | | 0.8x+6=2/0.4x+3 | | 2(x-8.5)=-11 | | -9(w-1)=-2w+37 | | 0=-7x+4 | | 8u-38=2(u-4) | | 3(y-7)=5y-7 | | 300000=x-(.06x) | | 3(x+13)=10(x-1 | | 4x+30=5x-24 | | 12-14=x | | (x+10000)*(x+10000)=0 | | 12-2x=2.0 | | |x+4=9 | | 15+16/4=d | | 12+16/4=d | | 25b-4=36 | | 13+16/4=d | | 9(z+1)-2(z-2)=4(z-4)+2(z-3) |