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)
(1/5)*(x-15)+(1/5)*(x+5) = (1/5)*(2*x+3) // - (1/5)*(2*x+3)
(1/5)*(x-15)+(1/5)*(x+5)-((1/5)*(2*x+3)) = 0
(1/5)*(x-15)+(1/5)*(x+5)+(-1/5)*(2*x+3) = 0
1/5*(x-15)+1/5*(x+5)-1/5*(2*x+3) = 0
1/5*(x-15)+1/5*(x+5)-1/5*(2*x+3) = 0
2/5*x-2/5*x-2-3/5 = 0
-13/5 = 0
-13/5 = 0
-13/5 = 0 // * 5
-13 = 0
x belongs to the empty set
| X2/3-2X/3+1/6=0 | | 5+p/2=45 | | 39+5x=63+2x | | 8y+10(0)=42 | | K+(-7)=3 | | 8(0)+10x=42 | | 15=-3x-9 | | x+5y-6=0 | | 4x+25/x=9 | | 4r^2-25=0 | | 8y+10(0)=378 | | 8(0)+10x=378 | | 12u+16=4(3u+4) | | 7n-4=-32 | | .02m+.08(8-m)=1.78 | | 5y^2+5y=100 | | 5/2=6/x | | 4x+y=46 | | 3x+2y=47 | | 157+72x=175+69x | | 7f+18=4f-34 | | 124x+21=17 | | 124x+21=46 | | 25+7x=42+6x | | y+2(0)=10 | | 0+2x=10 | | 31g=14 | | 4=-6r | | 3y-0=-5 | | 3(0)-x=-5 | | 77h=1.5 | | 3/x=15/20 |