You also want an ePaper? Increase the reach of your titles
YUMPU automatically turns print PDFs into web optimized ePapers that Google loves.
2626b<br />
10 xy−(4 −xy)<br />
10xy− 4 + xy<br />
11xy − 4<br />
2628a<br />
2<br />
xy( x − y) −x( xy − y )<br />
2 2 2 2<br />
( x y−xy ) −( x y−xy )<br />
2<br />
xy<br />
0<br />
−<br />
2<br />
xy<br />
−<br />
2629a<br />
15a − 20<br />
=<br />
5<br />
5 (3a − 4)<br />
=<br />
5<br />
3a−4 2630a<br />
s + 5<br />
=<br />
3s+ 15<br />
1( s + 5)<br />
3( s + 5)<br />
1/3<br />
2639a<br />
x<br />
= 8 ( mult 3)<br />
3<br />
x<br />
3 ⋅ = 38 ⋅<br />
3<br />
x = 24<br />
2<br />
xy<br />
+<br />
2<br />
xy<br />
LÖSNINGAR DEL B<br />
2626c<br />
6a+ 2(1−3 a)<br />
6 a+ (2−6 a)<br />
6a+ 2−6a 2<br />
2629b<br />
12 −15x<br />
=<br />
3<br />
3 (4 − 5 x)<br />
=<br />
3<br />
4−5x 2630b<br />
x + xy<br />
=<br />
x<br />
x (1 + y)<br />
x<br />
1+ y<br />
2639b−d<br />
2m<br />
= 10<br />
5<br />
2m<br />
5 ⋅ = 510 ⋅<br />
5<br />
2m= 50 ( div 2)<br />
50<br />
m =<br />
2<br />
m = 25<br />
( mult 5)<br />
2627a<br />
aa ( + b) −ba ( −7<br />
b)<br />
a + ab − ab− b<br />
a + ab− ab+ 7b<br />
2 2<br />
a + 7b<br />
(<br />
2<br />
) ( 7<br />
2<br />
)<br />
2 2<br />
2628d<br />
2 2 2<br />
4 st( t −s) −2 s(2 t −st)<br />
2 3 2 3<br />
(4st −4 s t) −(4st −2<br />
s t)<br />
2<br />
4st<br />
3<br />
−2st<br />
3 2<br />
−4st− 4st<br />
3<br />
+ 2st<br />
2629c<br />
2<br />
a − 3a<br />
=<br />
a<br />
a ( a − 3)<br />
=<br />
a<br />
a − 3<br />
2630c<br />
2<br />
4t + 8t<br />
=<br />
12t + 24<br />
4( tt+<br />
2)<br />
=<br />
12( t + 2)<br />
4t(<br />
t+ 2)<br />
3⋅ 4 ( t + 2)<br />
= t<br />
2639e<br />
s 18<br />
=<br />
−7<br />
63<br />
63 s = ( −7) ⋅18<br />
63s =−126<br />
−126<br />
s =<br />
63<br />
s =−2<br />
3<br />
( kors mult)<br />
( div 63)<br />
45<br />
2627b<br />
4 y(3 + x) −4 x(1 − y)<br />
(12 y + 4 xy) −(4x−4 xy)<br />
12y+ 4xy− 4x+ 4xy<br />
12y+ 8xy−4x 2629d<br />
2<br />
12b − 4b<br />
=<br />
4b<br />
4b<br />
(3b −1)<br />
=<br />
4b<br />
3b−1 2630d<br />
2 2<br />
9xy −15x<br />
y<br />
=<br />
3xy<br />
3xy<br />
(3y − 5 x)<br />
=<br />
3xy<br />
3y−5x 2639 f<br />
−8k<br />
= 64<br />
7<br />
−8k<br />
7 ⋅ = 7⋅64 7<br />
− 8k = 448 div −<br />
448<br />
k =<br />
−8<br />
k =−56<br />
( mult 7)<br />
( 8)