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a) -3 (2x + 1) = - (x - 4)
b) 8x - (1 + 2x) = 2 (x - 0,5)
c) x - 2 (x - 1) = 0,2 (1 - 2x)
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a) -3 (2x + 1) = - (x - 4)
-6x - 3 = -x + 4
-6x + x = 4 + 3
-5x = 7 /: (-5)
x = -1,4
b) 8x - (1 + 2x) = 2 (x - 0,5)
8x - 1 - 2x = 2x - 1
8x - 2x - 2x = -1 +1
4x = 0 /:4
x = 0
c) x - 2 (x - 1) = 0,2 (1 - 2x)
x - 2x + 2 = 0,2 - 0,4x
x - 2x + 0,4x = 0,2 - 2
-0,6x = -1,8 / : (-0,6)
x = 3