If it's not what You are looking for type in the equation solver your own equation and let us solve it.
u in (-oo:+oo)
(2/3)*u = -14 // + 14
(2/3)*u+14 = 0
2/3*u+14 = 0 // - 14
2/3*u = -14 // : 2/3
u = -14/2/3
u = -21
u = -21
| 3x+8+2x=-17 | | 14=-7/4y | | 3x-7=-2(5+6xy)+8z | | 8x-4=6x+15 | | x^2+100000x+3150000000=0 | | 2x+5+6x=13 | | y^2=6x^2-7 | | -6x/7=-24 | | 24x-1=180 | | -2m-5=25 | | 6x-12=25 | | x+1-4x=-11 | | 5p+1=2p+7 | | 16/7=-8y | | 3z^7+8=6 | | x^2+6x=576 | | 4-12y=10y | | 3/5y=-21 | | x^2/4=8 | | 6(-k-2)=-8(k+2) | | 4k-8=8 | | 3x(x+2)=2x+8 | | -4n+11=-9 | | 4n-6=0 | | x^4-73x^2+576=0 | | 4cos(4x)=0 | | 2(-1)y=1 | | 8x+112=15 | | 4n+11=-9 | | 19x+28=104 | | 6m-5=-25 | | 4z=7-7z |