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*x)/2 = 90 // - 90
(13*x)/2-90 = 0
13/2*x-90 = 0 // + 90
13/2*x = 90 // : 13/2
x = 90/13/2
x = 180/13
x = 180/13
| 9841.4277=1/3*524.41*h | | X-9y=3/4 | | -6+7x+2y=0 | | -23x+3y=-29 | | 0.4(x-4)=4.4 | | 760-.3x=.7(1085.714-.4285x) | | -13a-(-5a)+a-10=11 | | 5/10*4 | | x^2/625 | | (2x^2-5x)(7x+1)=0 | | 12(4c)+7(3b)=69 | | 9(5x-3)=11(5x-7) | | 125t^3-1=0 | | -3x+20=x+4 | | 7/9-3/7 | | z^2+9z=32 | | 4c-13-16c=-49 | | (2x/3-8/3=x) | | t+5+6= | | (x^2)+3x-18=0 | | 760=(.3*x)+(.7*y) | | s-s+s=11 | | x/3=7/4 | | 760=(3*x)+(.7*y) | | 40n+12=24n+4 | | (4x+13)*(3x-1)= | | 6times(3+k)=48 | | cotx=.78 | | 5r+r-4r-r+4r=15 | | 2n-9=8n+15 | | -3(3x-5)=2(2x-7) | | 2a/5=15 |