Respuesta :

70% of x=35
70/100 *x=35
x=35*100/70=50
"70% = 0.7 OR 7/10

7/10 * x = 35    | *=multiplication
7/10 * 10/7 * x = 35/1 * 10/7         7/10 * 10/7 => 1
1x = 35/1 * 10 / 7
x = (35*10)/7
x = 350 / 7
x = 50"