Odpowiedź:
1) 4x + 32 -x = 2x + 12
4x -x -2x = 12 -32
x = -20
2) 8x - 5 = 6x + 20
8x -6x = 20+5
2x = 25 /:2
x = 12,5
3) x -8 = 1/3x +2 /*3
3x -24 = x + 6
3x - x = 6+ 24
2x = 30 /:2
x = 15
nie wiem ile masz czasu, więc napisze tyle
Szczegółowe wyjaśnienie:
1.
4(x + 8) - x = 2(x + 6)
4x + 32 - x = 2x + 12
3x - 2x = 12 - 32
2.
8x - 5 = 6x + 20
8x - 6x = 20 + 5
x = 12 1/2
3.
x - 8 = 1/3x + 2
x - 1/3x = 2 + 8
2/3x = 10 /*3/2
x = 10 * 3/2 = 6
4.
3/4(x - 1) = 3
3/4x - 3/4 = 3
3/4x = 3 + 3/4 /*4/3
x = 3 3/4 * 4/3 = 15/4 * 4/3 = 5
5.
(5x - 4)(6 + x) - 5x² = 28
30x + 5x² - 24 - 4x - 5x² = 28
26x = 28 + 24 /:26
x = 52/26 = 2
6.
-6x² + (2x + 1)(3x + 4) = 26
-6x² + 6x² + 8x + 3x + 4 = 26
11x = 26 - 4 /:11
x = 22/11 = 2
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Odpowiedź:
1) 4x + 32 -x = 2x + 12
4x -x -2x = 12 -32
x = -20
2) 8x - 5 = 6x + 20
8x -6x = 20+5
2x = 25 /:2
x = 12,5
3) x -8 = 1/3x +2 /*3
3x -24 = x + 6
3x - x = 6+ 24
2x = 30 /:2
x = 15
nie wiem ile masz czasu, więc napisze tyle
Szczegółowe wyjaśnienie:
Odpowiedź:
1.
4(x + 8) - x = 2(x + 6)
4x + 32 - x = 2x + 12
3x - 2x = 12 - 32
x = -20
2.
8x - 5 = 6x + 20
8x - 6x = 20 + 5
2x = 25 /:2
x = 12 1/2
3.
x - 8 = 1/3x + 2
x - 1/3x = 2 + 8
2/3x = 10 /*3/2
x = 10 * 3/2 = 6
4.
3/4(x - 1) = 3
3/4x - 3/4 = 3
3/4x = 3 + 3/4 /*4/3
x = 3 3/4 * 4/3 = 15/4 * 4/3 = 5
5.
(5x - 4)(6 + x) - 5x² = 28
30x + 5x² - 24 - 4x - 5x² = 28
26x = 28 + 24 /:26
x = 52/26 = 2
6.
-6x² + (2x + 1)(3x + 4) = 26
-6x² + 6x² + 8x + 3x + 4 = 26
11x = 26 - 4 /:11
x = 22/11 = 2
Szczegółowe wyjaśnienie: