Sagot :
x + x * 5/3 = 1000
x + 5x/3 = 1000
3x/3 + 5x/3 = 1000
8x/3 = 1000
8x = 3*1000
8x = 3000
x = 3000 / 8
x = 375
Réponse :
x+x * 5/3 = 1000
5/3 * 3/5x + x*5/3 =1000
5/3 (3/5x + 5/5x ) =1000
3/8x = 1000
Après tu calcule sachant que
x = 1000*3/8
Voilà