Rozwiąż nierówności.
a) 4(2x -3) + 3(5x - 2) < 8(x +1) - 9(x + 4) - 14
b) 2(x - 3) + 3(x - 4) + 4(x - 5) + 5(x - 6) + 6(x -7) < 0
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a) 8x - 12 + 15x - 6 < 8x + 8 - 9x - 36 - 14
23x - 18 < - x - 42
24x < -24
x < -1
b) 2x - 6 + 3x - 12 + 4x - 20 + 5x - 30 + 6x - 42 <0
20x - 110 <0
20x < 110
x < 5,5
a) 4(2x -3) + 3(5x - 2) < 8(x +1) - 9(x + 4) - 14
8x - 12 + 15x - 6 < 8x + 8 - 9x - 36 - 14
23x - 18 < -x -42
23x + x < -42 + 18
24x < -24
x < -1
b) 2(x - 3) + 3(x - 4) + 4(x - 5) + 5(x - 6) + 6(x -7) < 0
2x - 6 + 3x - 12 + 4x - 20 + 5x - 30 + 6x - 42 < 0
20x -110 < 0
20x < 110
x < 5,5