Question

7,25-x=2,3+0,15;x+1,21-7,29=10

Answer 1

7,25-x=2,3+0,15
7,25-x=2,45
x=7,25-2,45
x=4,8

x+1,21-7,29=10
x+1,21=10+7,29
x+1,21=17,29
x=17,29-1,21=16,08

Answer 2

1.
$7,25-x=2,3+0,15$

$\frac{725}{100}-x=\frac{23}{10}+\frac{15}{100}$

Aduci la acelasi numitor(100):

[tex]725-100x=230+15 725-100x=245 100x=725-245 100x=480 x=4.8 [/tex]

2.
$x+1,21-7,29=10$

$x+\frac{121}{100}-\frac{729}{100}=10$

Aduci la acelasi numitor(100):

[tex]100x+121-729=100 100x+121=829 100x=708  x=7.08[/tex]