👤

Ajutor!!!
20x/100+30 ( x-20x/100)+560=


Răspuns :

20x/100 + 30 * (x - 20x/100) + 560 = 
x/5 + 30 * (x - x/5) + 560 =
x/5 + 30 * (5x/5 - x/5) + 560 = 
x/5 + 30 * 4x/5 + 560 = 
x/5 + 120x/5 + 560 = 
121x/5 + 2800/5
121x = - 2800
x = - 2800/121