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11.4k + 7 = - 3 +5k;
12.6 - 2с = 8 - 3с;
13.0,5х + 3 = 0,2х;
14.- 0,4α - 14 = 0,3α;
15.4,7 - 8z = 4,9 - 10z;
16.6,9 - 9n = -5n -33,1;
17. - 19t = 12t;
18. 7,3α = 1,6α;
19. 7α = - 310 - 3α;
20. 5[tex] x^{2} [/tex] + 1 = 6х +5[tex] x^{2} [/tex] .
11.4k + 7 = - 3 +5k;
12.6 - 2с = 8 - 3с;
13.0,5х + 3 = 0,2х;
14.- 0,4α - 14 = 0,3α;
15.4,7 - 8z = 4,9 - 10z;
16.6,9 - 9n = -5n -33,1;
17. - 19t = 12t;
18. 7,3α = 1,6α;
19. 7α = - 310 - 3α;
20. 5[tex] x^{2} [/tex] + 1 = 6х +5[tex] x^{2} [/tex] .
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Answers & Comments
4k-5k=-3-7
-k=-10
k=10
12.6 - 2c = 8-3c
-2c+3c=8-6
c=2
13.0,5x + 3 = 0,2x
0.,5x-0,2x=-3
0,3x=-3
x=-10
14.- 0,4α - 14 = 0,3α
-0,4a-0,3a=14
-0,7a=14
a=-20
15.4,7 - 8z = 4,9 - 10z
-8z+10z=4,9-4,7
2z=0,2
z=0,1
16.6,9 - 9n = -5n -33,1
-9n-5n=-33,1-6,9
-14n=-40
n=20/7
17. - 19t = 12t
-19t-12t=0
-31t=0
t=0
18. 7,3α = 1,6α
7,3a-1,6a=0
5,7a=0
a=0
19. 7α = - 310 - 3α
7a+3a=-310
10a=-310
a=-31
20. 5x^2 + 1 = 6x +5x^2
1=6x
6x=1
x=1/6