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Kipish [7]
3 years ago
13

4a + 6b = 10 2a - 4b =12 What does 12a equal?

Mathematics
1 answer:
Dennis_Churaev [7]3 years ago
4 0

multiply second equation by 2 and rewrite

4a + 6b = 10

4a - 8b = 24

subtract equations

0 + 14b = -14

14b = -14

b = -1

sub back into 4a + 6b = 10 to find the value of a

4a + 6 (-1) = 10

4a - 6 = 10

4a = 16

a = 4

therefore, 12a = 12×4

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