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)
(3/8)*r = 40 // - 40
(3/8)*r-40 = 0
3/8*r-40 = 0 // + 40
3/8*r = 40 // : 3/8
r = 40/3/8
r = 320/3
r = 320/3
| 6/7x6/7 | | 9-14/4=-2 | | 6-2=n-6 | | -3.5+-1.5y=0.5+-1.5y | | 648=8x^2 | | -12x-144=-9+-63 | | 49+x^2=36+x^2 | | 30p+25=145 | | 2/13x4/5 | | x/3=9.9 | | 5x^2+7x-3=4x-1 | | 8x^2-8x+5=0 | | 3/4x=128 | | ⅞x5/6 | | 5x+8+x-12=120 | | 610000=x-14000 | | 4x+1=36 | | 3h=2(h-2)-1 | | 21x=-105 | | 40/350 | | 6/3(-1/5)=(6/3*3/6)v | | -10k-4r=22 | | (7a/3b)^2 | | nx+ln(x+2)=0 | | x^2+1x-68=4 | | 16-n=10-2 | | 64*2^(x/20) | | 2x^2-10x-12=-5x-9 | | m+1.6=9 | | 4(3r-2)=4+12r | | (a^2-4a-1)(a^2-4a-1)-16=0 | | (-4/3*-4)y=-4/3(-8/3) |