Răspunsuri

  • Utilizator Brainly
2014-02-08T12:58:42+02:00
X-x30/100=140
x-3x/10=140
7x/10=140
x=140*10/7=200
2014-02-08T13:08:39+02:00
A-30/100a=140(se simpfica si va da);
a-3/100a=140
a-3a/100=140
a/1-3a/10=140
amplifici cu 10 : 10a/10-3a/10=140
7a/10=140/1⇒7a=140x10 supra1⇒7a=1400⇒a=200