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OPGAVEN |
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1. |
Los op: 2x - 4 = 5x + 7 |
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2. |
Los op: 4 - (3x - 3) = 5x |
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3. |
Schrijf zonder haakjes: -2(x + 3)(4
- 3x) |
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OPLOSSING |
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1. |
2x - 4 = 5x + 7
Þ -3x = 11 Þ
x = -11/3 = -32/3. |
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2. |
4 - (3x - 3) = 5x
Þ 4 - 3x + 3 = 5x
Þ 7 = 8x Þ
x = 7/8 |
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3. |
-2(x + 3)(4 - 3x) =
-2(4x - 3x2 + 12 - 9x) = -8x + 6x2
- 24 + 18x = 6x2 +
10x - 24 |
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