Question

Rezolvati ecuatiile:
1 pe 9 ori x -3=5,25;
0,(2)x + 3,5=3,75;
2 pe 3 x -2=0,(3)
Ajutati.ma va rog!

Answer 1

1/9·x-3=5,25⇒1/9·x=3+5,25⇒1/9·x=8,25⇒x=8,25·9⇒x=74,25
0,(2)x+3,5=3,75⇒2/9x=3,75+3,5⇒2/9x=7,25⇒x=7,25·9/2⇒x=32,625
2/3x-2=0,(3)⇒2/3x-2=3/9⇒2/3x⇒3/9+2(il amplificam cu 9⇒18/9)⇒2/3x=21/9⇒x=21·3/2·9⇒x=21/9=7/3