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)
13/7 = x/12 // - x/12
13/7-(x/12) = 0
13/7-1/12*x = 0 // - 13/7
-1/12*x = -13/7 // : -1/12
x = -13/7/(-1/12)
x = 156/7
x = 156/7
| 5/8=15/x | | -2(3-4)= | | 11x-1+5=65x-36 | | -7(-5a+3)-a=217 | | N+(n+2)=126 | | 3b^2+4d^2+7b^2= | | 9+1/6x=12 | | (256a^3+192a^2)+(-160a-120)=0 | | 2(3x+2)=5(12x+8) | | 8h-8=8h+4 | | .5x^4+3x^3+3.5x^2+6x+5=0 | | 5=-9-p | | 10x+32= | | y^3+8y^3= | | n+(n+2)=117 | | 11+1/5x=12 | | (9x^2-8x)=0 | | 7x^9+7x=21factor | | 5/6=b/15 | | (-16/3)-3 | | (4x+3y-6)+(4x+7y+2)= | | -60-3x=-8x+20 | | (2/3)(-2)^3 | | (3+7)(5+6x)=20-6.5(x+1) | | 12x^2-3x=42 | | (9x^2-8x)/(x^2-4x-32) | | 0.2x+5.1=4.8 | | 7x^9+7x=21 | | 2x+2(x+2)=16 | | y^2+x^2-4y-12=0 | | 6a+1=2a-9 | | 2.6x=2.4x+4 |