Răspuns:
1-a.)
[tex]0.7x = 1.05 \times 2.8[/tex]
[tex]0.7x = 4.2[/tex]
[tex]x = 6[/tex]
b.)
[tex]2.1x = 14 \times 0.54[/tex]
[tex]2.1x = 7.56[/tex]
[tex]x = 3.6[/tex]
c.)
[tex]1.5x = 0.42 \times 35[/tex]
[tex]1.5x = 14.7[/tex]
[tex]x = 9.8[/tex]
2-a.)
[tex]10x = 13 \times 4[/tex]
[tex]10x = 52 \\ x = 5.2[/tex]
b.)
[tex]20x = 12 \times 7 \\ 20x = 84 \\ x = 4.2[/tex]
c.)
[tex]30x = 25 \times 9 \\ 30x = 225 \\x = 7.5[/tex]
