6х=28-х 9х-26=30-5х 7-3х=6х-5.6 0.9×-7.4=-0.4×+4.3 5.8-1.6×=0.3х-1.8

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1) 6x = 28 -
Adding x to both sides
6x + x = 2
7x = 2
Dividing by 7
x = 4

2) 9x - 26 = 30 - 5
Adding 5x to both sides
9x + 5x - 26 = 3
14x - 26 = 3
Adding 26 to both sides
14x = 5
Dividing by 14
x = 4

3) 7 - 3x = 6x - 5.
Adding 3x to both sides
7 = 9x - 5.
Adding 5.6 to both sides
12.6 = 9
Dividing by 9
x = 1.4

4) 0.9x - 7.4 = -0.4x + 4.
Adding 0.4x to both sides
0.9x + 0.4x - 7.4 = 4.
1.3x - 7.4 = 4.
Adding 7.4 to both sides
1.3x = 11.
Dividing by 1.3
x = 9

5) 5.8 - 1.6x = 0.3x - 1.
Adding 1.6x to both sides
5.8 = 1.9x - 1.
Adding 1.8 to both sides
7.6 = 1.9
Dividing by 1.9
x = 4