Question

Am o suma de lei. Primesc 15% si apoi am 690.Ce suma am avut?

Answer 1

x+15%=690
x+$\frac{15}{100}$=690
x=690-$\frac{15}{100}$
690 amplificam cu 100
x=$\frac{69000-15}{100}$
x=$\frac{690-15}{1}$
x=$\frac{675}{1}$