Răspuns:
x=75
Explicație pas cu pas:
70%*x=52.5
70x/100=52.5
7x/10=52.5
7x=52.5*10
7x=525
x=525/7
[tex] \frac{70}{100} \times x = 52.5[/tex]
[tex]x = 52.5 \times \frac{100}{70} [/tex]
[tex]x = \frac{5250}{70} = \frac{525}{7} = 75[/tex]
