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)
7*k = 4/7 // - 4/7
7*k-(4/7) = 0
7*k-4/7 = 0
7*k-4/7 = 0 // + 4/7
7*k = 4/7 // : 7
k = 4/7/7
k = 4/49
k = 4/49
| .75*x=21 | | x+2.9=4.5 | | 1 x --1 y= 13 5 | | 4(2y+5/3)-5y=170 | | 6x-0.5y=3 | | 5x-2x+3=23 | | 7a(-4+7a)=3(a+1) | | 1/6*21/8*6 | | 3r+7=-6r-56 | | x^2+8x+16=45 | | 1/6x2 | | x+21=.75 | | 4x^2-6=30 | | 31/3+65/6 | | 6a+3a-5a-12a+4a=24 | | -7(5v-2)+2(v-7)=7v-8v | | 7x+3x=70 | | -8c= | | 3p/2 | | -7(v-8)=-7(2v+6) | | 2n/9m | | 30n=3 | | -2(3n+2)-4(3+2n)=-58 | | a=3.14(6.25) | | f(x)=2(x-5)2-8 | | 3(x-6)+14=11 | | 30y/12+y=15 | | 2n/9m*3p/2 | | V^2+12v-18=-5 | | 5(r-3)+2(r-5)=17 | | 7(7-8n)+2(3n+1)=-49 | | -2(3x-7)-2(2x-6)=66 |