You can put this solution on YOUR website!
There is no UNIQUE solution to this equation because you have 4 unknowns & only one equation.
However you can make up a table & find many combinations od a, c, e & f that satisfus this equation thus:
a---2c---3e---2f=270
50+2*25+3*10+2*70=270
50+50+30+140=270
OR
100+2*10+3*20+2*45=270
100+20+60+90=270
270=270
And there are many additional combinations of a,c,e & f that are solutions.