If it's not what You are looking for type in the equation solver your own equation and let us solve it.
n in (-oo:+oo)
(1/2)*n = 15 // - 15
(1/2)*n-15 = 0
1/2*n-15 = 0 // + 15
1/2*n = 15 // : 1/2
n = 15/1/2
n = 30
n = 30
| (2x+7)2=2517 | | y+2(4)=3 | | x(x-3)(x-5)= | | 6=2/3y | | y+2(-3)=3 | | 8m=70.00 | | 2x43/8 | | -5y-100x+8=0 | | 14-12x+39x-18x=256-60y-100 | | 4x-16/4 | | x^2+y^2+12x-26y+169=0 | | 25x=20x | | -3/2(x-1/2)1/5-5x | | -100y-5x+8=0 | | 115+g=65 | | 12w+15r=39.87 | | 14-12x+39x-18x=256-60x-100 | | (y-7)squared=3 | | 7x-7-9x+10=2+3x | | 1000=25+j | | 35+h=45 | | 5r^2-44r+120=-33+11r | | 4a+15=31 | | 3.4x-18=1.4x+2 | | -12=6/5r | | 5.016+23.56x=10.02+10.05x | | -0.6x=-5.4 | | 48+24r=8r+384 | | -5x-100y+8=0 | | 80=4x+8x | | 3(x-2)+7=-2(-x-5) | | H+48=218 |