1)
4x + 5 = 3x + 11
4x - 3x = 11 - 5
x = 6
2)
6x + 5 = 2x + 17
6x - 2x = 17 - 5
4x = 12 | : 4
x = 3
3)
9x - 4 = 7x + 1
9x - 7x = 1 + 4
2x = 5 | : 2
x = 2,5
4)
4x - 9x + 2 = -13
4x - 9x = -13 - 2
-5x = -15 | : (-5)
x = 3
5)
27x - 7 + 37x = 3
27x + 37x = 3 + 7
64x = 10 | : 64
x = 10/64 = 5/32
6)
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