If it's not what You are looking for type in the equation solver your own equation and let us solve it.
b in (-oo:+oo)
(2/3)*b+8 = 20 // - 20
(2/3)*b-20+8 = 0
2/3*b-12 = 0 // + 12
2/3*b = 12 // : 2/3
b = 12/2/3
b = 18
b = 18
| 12a+4-5a= | | 3+4a=2a+17 | | 64x^2+36y^2=576 | | 5.4-3.1(2p-1)=32 | | 0.50x+0.15(7)=25.5 | | 3a-8=6+5a | | .30x=45 | | y=-4+-1x | | 4x^2-19x+10=-2x+6 | | 14(6c-4)=2c-7 | | -2(8x-14)=18 | | 5x^(-1/3)=0.06 | | -3/8+3(2)/6 | | 2(4p)+3d-6(8d)= | | -10mnp-6n+6p+6=n-5p+2 | | 2x^2-9x+29=0 | | 1/3*x=1017 | | 1/3*x1017 | | -7/5u-5=4/3u-1/5 | | 3(3x-4)=2-(x-8) | | -23/9+7/9x | | -3-0.6b+7-0.3b= | | 4/3=c/4 | | 1/4*x=866 | | 9(x+10)=9 | | 9/3=c/4 | | 1/3*x=1/4*x | | 9a-3(a+8)=8(a-3)-2a | | 14+8x=4x+6 | | 1/4(x+5)=3.50 | | 1/2(6x+4)=5(2x-8) | | 2(x+4)=5x+6-3x |