Question

Dupa ce mihaela a citit 30% dintr-o carte,a remarcat ca mai are de citit inca 140 de pagini. Cate pagini are cartea pe care o citeste Mihaela?

Answer 1

$\frac{30}{100}\cdot{x}+140=x$

$\frac{30x}{100}+140=x$

30x+14 000 = 100x
14 000=70x
x=200

Answer 2

x-cartea
x-30/100 × x=140
x-30x/100=140
100x-30x/100=140
70x/100=140
x=100× 140/70
x=200