7 – 3z + 5z – 12 = 0
– 3z + 5z = 0 + 12 – 7
2z = 5
z = 2.5
0.9x = 0.8x – 6 – 0.1x
0,9x – 0,8x + 0,1x = – 6
0.2x = -6
x = -30
5(k-2)=9
5k – 10 = 9
5k = 9 + 10
5k = 19
k = 3.8
7-9x=-4(4x-5)
7 – 9x = – 16x + 20
– 9x + 16x = 20 – 7
7x = 13
x = 13/7
х=1,85714285714
7 – 3z + 5z – 12 = 0
– 3z + 5z = 0 + 12 – 7
2z = 5
z = 2.5
0.9x = 0.8x – 6 – 0.1x
0,9x – 0,8x + 0,1x = – 6
0.2x = -6
x = -30
5(k-2)=9
5k – 10 = 9
5k = 9 + 10
5k = 19
k = 3.8
7-9x=-4(4x-5)
7 – 9x = – 16x + 20
– 9x + 16x = 20 – 7
7x = 13
x = 13/7
х=1,85714285714