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| 1. | 2x - 3
- 4x = -2 • 4x + 8 -2x - 3 = -8x + 8 -2x = -8x + 11 6x = 11 x = 11/6 |
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| 2. | -2 - 3 • p • 3 + p = 4p • 2 + 1
-2 - 9p + p = 8p + 1 -2 - 8p = 8p + 1 -8p = 8p + 3 -16p = 3 p = -3/16 |
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| 3. | -2 - 5
- 6a = 4a • 2
- 4 -2 - 5 - 6a = 8a - 4 -7 - 6a = 8a - 4 -6a = 8a + 3 -14a = 3 a = -3/14 |
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| 4. | 10 - 6 • a : 2 = -2
- 2a - 3
10 - 3a = -5 - 2a -3a = -15 - 2a -a = -15 a = 15 |
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| 5. | 2 + 3 • 3 - x = -3 • 2 • x + 8 2 + 9 - x = -6x + 8 11 - x = -6x + 8 -x = -6x - 3 5x = -3 x = -3/5 |
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| 6. | -2 - x
- 2 - x = 2x • -3 + 4 -2 - x - 2 - x = -6x + 4 -4 - 2x = -6x + 4 -2x = -6x + 8 4x = 8 x = 2 |
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| 7. | -3 • -y + 4 = 2 • y
- 6 : 3
3y + 4 = 2y - 2 3y = 2y - 6 y = -6 |
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| 8. |
p - 7 + p - 2 • p = p -7 = p |
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| 9. | 3p • 2 • -2
- 2p = -p + 26 -12p - 2p = -p + 26 -14p = -p + 26 -13p = 26 p = -2 |
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| 10. | 2c • 4 • 6 - 2 = 5
- c • 4 - 6 48c - 2 = -1 - 4c 48c = 1 - 4c 52c = 1 c = 1/52 |
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© h.hofstede (h.hofstede@hogeland.nl) |
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