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Nataliya [291]
4 years ago
5

4a + 6b= 10 2a - 4b =12 what does 12a=

Mathematics
1 answer:
mixer [17]4 years ago
3 0
4a + 6b = 10
2a - 4b = 12...multiply by -2
----------------
4a + 6b = 10
-4a + 8b = - 24 (result of multiplying by -2)
------------------add
14b = - 14
b = -14/14
b = -1

2a - 4b = 12
2a - 4(-1) = 12
2a + 4 = 12
2a = 12 - 4
2a = 8
a = 8/2
a = 4

so 12a = 12(4) = 48 <==
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3 years ago
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artcher [175]

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Step-by-step explanation:

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2 years ago
Negative 10.9p plus 3.9 equals negative 9.18.... what does p equal
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4 0
3 years ago
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Scrat [10]

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3 0
3 years ago
I need help. Can you help me ?
natita [175]
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3 years ago
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