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2nESO12-13- Bloc 1.pdf - Institut Alexandre Satorras

2nESO12-13- Bloc 1.pdf - Institut Alexandre Satorras

2nESO12-13- Bloc 1.pdf - Institut Alexandre Satorras

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Resol aquestes equacions per aïllament:<br />

7x = 91<br />

5x = 12<br />

4x= 3<br />

-2x=6<br />

x – 6 = 23<br />

17 + x= 4<br />

12= 3 + 5x<br />

4+2x=17<br />

3x + 18 = 57<br />

4x – <strong>13</strong> = 25<br />

17= 4x - 5<br />

5x + 25 = 10<br />

87= 35 – 4x<br />

x<br />

= 17<br />

3<br />

2 x<br />

=<br />

5<br />

8<br />

x + 5<br />

= 12<br />

7<br />

x − 4<br />

= 8<br />

9<br />

5x<br />

+ 3<br />

= 9<br />

4<br />

2x<br />

− 5<br />

= 7<br />

4<br />

3· (x+5) = 12<br />

5 · (x-3)= 27

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