If it's not what You are looking for type in the equation solver your own equation and let us solve it.
r in (-oo:+oo)
(6.5/3)*r+5 = 11.5 // - 11.5
(6.5/3)*r-11.5+5 = 0
2.16666667*r-6.5 = 0 // + 6.5
2.16666667*r = 6.5 // : 2.16666667
r = 6.5/2.16666667
r = 3
r = 3
| -4x-18=-2 | | x^2+30=14x | | -43=-8+x/5 | | -x-29+13=2x | | x+3/2x=30 | | 2x+24=15 | | 2y=0x-2 | | 2N=421 | | 25=N/4-30 | | 9N-7=38 | | (8x+1)*(-5x+9)=x | | 9-2x/6=-4 | | 49s-25=51s-57 | | 4N+15=95 | | 6-2x/9=-4 | | 4x^2+12x+9=81 | | M=2x+(x-5) | | 2N=450 | | 2=xx+2 | | 3N=360 | | x+12=74 | | 8.3t+4.3t=48 | | N+162=318 | | 3(4x+11)=7x+5x+21 | | 8.3t-4.3=4b | | x+3x+13=105 | | .1p+6=7 | | 5n=421 | | 2a=40 | | 5n=415 | | 47q-38=58q-93 | | 129= |