6 klasa pomożecie :) zadanie 3
3t - 11 = 2t + 2
| |
| - 2t | -2t
t - 11 = 2
| +11 | + 11
t = 13
spr.
L = 3t - 11 = 3 * 13 - 11 = 39 - 11 = 28
P = 2t + 2 = 2 * 13 + 2 = 26 + 2 = 28
-2u + 5 = 9 - 3u
| +3u | + 3u
u + 5 = 9
| - 5 | - 5
u = 4
L = -2u + 5 = -2 * 4 + 5 = -8 + 5 = -3
P = 9 - 3u = 9 - 3 * 4 = 9 - 12 = - 3
L = P
a)
3t-11=2t+2
-2t | | -2t
t-11=2
t=2+11
t=13
L =3t-11=3*13-11=28
P=2t+2=2*13+2=26+2=28
b)
-2u+5=9-3u
+3u | | +3u
u+5 = 9
u=9-5
u=4
L =-2u+5=-2*4+5=-8+5=-3
P=9-3u=9-3*4=9-12=-3
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3t - 11 = 2t + 2
| |
| - 2t | -2t
t - 11 = 2
| |
| +11 | + 11
t = 13
spr.
L = 3t - 11 = 3 * 13 - 11 = 39 - 11 = 28
P = 2t + 2 = 2 * 13 + 2 = 26 + 2 = 28
-2u + 5 = 9 - 3u
| |
| +3u | + 3u
u + 5 = 9
| |
| - 5 | - 5
u = 4
L = -2u + 5 = -2 * 4 + 5 = -8 + 5 = -3
P = 9 - 3u = 9 - 3 * 4 = 9 - 12 = - 3
L = P
a)
3t-11=2t+2
-2t | | -2t
t-11=2
| |
t=2+11
t=13
L =3t-11=3*13-11=28
P=2t+2=2*13+2=26+2=28
b)
-2u+5=9-3u
+3u | | +3u
u+5 = 9
| |
u=9-5
u=4
L =-2u+5=-2*4+5=-8+5=-3
P=9-3u=9-3*4=9-12=-3