If it's not what You are looking for type in the equation solver your own equation and let us solve it.
k in (-oo:+oo)
2/5-(2*k) = -1/3 // + -1/3
2/5-(2*k)-(-1/3) = 0
2/5-2*k+1/3 = 0
11/15-2*k = 0 // - 11/15
-2*k = -11/15 // : -2
k = -11/15/(-2)
k = 11/30
k = 11/30
| 4x-3(4-5x)=9-(x-19) | | 1x-7=2x | | 2a(21)=420 | | 14=3B^2+4AB | | 0.01x+1=2 | | 5x-9y*5y-3x=0 | | 0.01+1=2 | | (3x+6)4=3 | | 0.7328=X/4.7 | | 7-3y=31 | | 9(p+7)-6=9-2(p+9) | | X+-24+18=126 | | x^4=0.5 | | 5-x=10-3x | | -x/y=21 | | 3.1x-7.86=6.4 | | 0.4x-6=12x+1.2 | | 1x+7(3x+47)=89 | | 39-19=100 | | 39+19=100 | | 2y+8+4y=9y-6-7 | | X+7(3x+47)=89 | | 3/10n=1/2 | | 0.25x+0.25=0.75x-0.25 | | 2x+6=4c-1 | | 8z-z^2-12=0 | | (2x+3y)+6xy+(4y-1)= | | x(20-2x)(16-2x)-400=0 | | x(20-2x)(16-2x)= | | x(20-2x)(16-x)=400 | | (5v-6f)(5v+5f)= | | 9-m/4=4 |