If it's not what You are looking for type in the equation solver your own equation and let us solve it.
x in (-oo:+oo)
5/7 = x/42 // - x/42
5/7-(x/42) = 0
5/7-1/42*x = 0 // - 5/7
-1/42*x = -5/7 // : -1/42
x = -5/7/(-1/42)
x = 30
x = 30
| 3x+4/2x-7=5 | | 4k^2-20k+16=0 | | -32+3x=-8(4x+4)-6x | | (y+5)/x=-4/5 | | x^3-x^2-30=0 | | 2x^2+x-1/2=0 | | 31/3*21/3 | | x+200=300 | | z+8/z-9=11/-7 | | -2(3x-2)=-3x+7 | | 9x^2+6x=-2 | | 1/3x+7=12 | | 2x+36-2y+x+y=180 | | 2x+36-2y+x+7=180 | | 1/w-1-1/5w-5=4/5w-5 | | (4h-3)-(2h-8)= | | 33-7(n)=9075 | | y=220x^2+25x | | -4+10x-4x^2=0 | | 18069333.33333=(1/3)(440^2*x) | | 5x-12=16-12x | | (x-5)(x-6)=x^2+3x+7 | | 4(n-4)=1+5n | | y-4=6(x-6) | | x(a-b)-x(a+b)+4b^2=0 | | 63-7x=2x+16 | | 4w+3=-7 | | 4w+3=7 | | y=6-3 | | 2t-3=-3t+2 | | x*x+14=1887 | | -2(2x-5)=-3+7-x+3 |