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)
x+(2/3)*x = 45 // - 45
x+(2/3)*x-45 = 0
5/3*x-45 = 0 // + 45
5/3*x = 45 // : 5/3
x = 45/5/3
x = 27
x = 27
| 3x+6=17/4 | | 7x+8=23/2 | | -1/2x+1/4=15/4 | | 8+4/5x=68/5 | | 3/5+7x=-417/5 | | -4/5x+4/7=292/315 | | 1-1/3x=10/3 | | 5x-3/4=-81/28 | | 4/9+6x=-37/18 | | 1+1/7x=23/21 | | 5/6x-8/9=-38/9 | | -4/5+2/3x=-23/60 | | 1/4+3x=121/4 | | 7+3/5x=38/5 | | 9-1/2x=121/14 | | 4x+3/5=43/5 | | 1/7+3x=4/7 | | 1/5x-5=-103/20 | | 4/5+6x=-326/5 | | -1/2x+1=8/11 | | 1+2x=-19 | | -1/7x+3=17/7 | | 4/7x-1/4=-1/4 | | 1/2x+7=83/12 | | 2/3x-4/9=8/9 | | 4/5x+5=21/5 | | 4/7x-8=-284/35 | | 3/5+4x=-147/55 | | 9+2/5x=13 | | -7x-4=-51/11 | | 7+4x=17/2 | | 5x+3/8=323/8 |