Consider the given expression.
10x2+15x+635x2−25x+12=2x+3x−5
⇒10x3+15x2+63x−50x2−75x−315=10x3−50x2+24x+15x2−75x+36
⇒63x−315=24x+36
⇒39x=351
⇒x=9
Hence, x=9