Explicație pas cu pas:
Buna !!
[tex]70\% \: din \: x = 140 \\ \frac{70}{100} \times x = 140 \\ x = \frac{140}{1} \div \frac{70}{100} \\ x = \frac{140}{1} \times \frac{100}{70} \\ x = \frac{14000}{70} ^{(10} \\ x = \frac{1400}{7} \\ \red{x = 200}[/tex]
[tex]10\% \: din \: x = \frac{10}{100} \times 200 = \frac{10 \times 200}{100} = \frac{2000}{100} = 20[/tex]
Succes !!;)
✿❀AndreeaBrainly123❀✿
