2(x-3) - (4 + x) = 2x - 6 - 4 - x = x - 10
jeżeli x = -1, to:
x - 10 = -1 - 10 = -11
0,5(6x - 4) - 3(2 - 3x) = 3x - 2 - 6 + 9x = 12x - 8
12x - 8 = 12*(-1) - 8 = -12 - 8 = -20
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2(x-3) - (4 + x) = 2x - 6 - 4 - x = x - 10
jeżeli x = -1, to:
x - 10 = -1 - 10 = -11
0,5(6x - 4) - 3(2 - 3x) = 3x - 2 - 6 + 9x = 12x - 8
jeżeli x = -1, to:
12x - 8 = 12*(-1) - 8 = -12 - 8 = -20