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2110a<br />
10 + 20<br />
30<br />
<br />
30<br />
2110b<br />
− 10 + 20<br />
10<br />
<br />
10<br />
2111a<br />
Antag att det tar x timmar<br />
−2−3⋅ x =−14<br />
−2− 3x=−14 − 3x=− 14+ 2<br />
− 3x=−12 −12<br />
x =<br />
−3<br />
x = 4<br />
4 h<br />
2112a<br />
( 2700 − 700)<br />
T = 8−6⋅ 1000<br />
T =−4C <br />
Svar Det snöar<br />
2123a<br />
8 4 ⋅ 2 2<br />
= =<br />
12 4 ⋅3<br />
3<br />
812 ⎦<br />
2123e<br />
24 8 ⋅3 3<br />
= =<br />
32 8 ⋅ 4 4<br />
24⎦32 2124a<br />
2 2⋅3 6<br />
= =<br />
7 7⋅3 21<br />
Höjdökningen i m<br />
<br />
Höjdökningen i km<br />
LÖSNINGAR DEL B<br />
2110c<br />
10 + −20<br />
10 − 20<br />
−10<br />
−10 <br />
( )<br />
2110d<br />
− 10 + −20<br />
−10 −20<br />
−30<br />
−30 <br />
( )<br />
2111b<br />
Antag att det tar x timmar<br />
5−3⋅ x =−10<br />
5− 3x=−10 − 3x=−10−5 − 3x=−15 −15<br />
x =<br />
−3<br />
x = 5<br />
5 h<br />
2112b<br />
2123b<br />
21 7 ⋅3 3<br />
= =<br />
35 7 ⋅5<br />
5<br />
21⎦35 ( 1500 − 5500)<br />
T =−22 −6⋅ 1000<br />
T = 2C<br />
<br />
Svar Det regnar<br />
2123 f<br />
33 11 ⋅3 3<br />
= =<br />
44 11 ⋅ 4 4<br />
33⎦44 2124b<br />
7 7⋅3 21<br />
= =<br />
9 9⋅3 27<br />
Höjdökningen i m<br />
<br />
Höjdökningen i km<br />
2123c<br />
18 6 ⋅3 3<br />
= =<br />
30 6 ⋅5<br />
5<br />
18⎦30 2123g<br />
24 12 ⋅ 2 2<br />
= =<br />
36 12 ⋅3<br />
3<br />
24⎦36 2124c<br />
1 1⋅3 3<br />
= =<br />
5 5⋅3 15<br />
2123d<br />
360 90 ⋅ 4 4<br />
= =<br />
450 90 ⋅5<br />
5<br />
360⎦450 2123h<br />
45 15 ⋅3 3<br />
= =<br />
60 15 ⋅ 4 4<br />
45⎦60 2124d<br />
7 7⋅3 21<br />
= =<br />
13 13⋅ 3 39<br />
21