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2 years ago

Solve the system of linear equations using linear combination.

Mathematics

2 answers:

lisov135 [29]2 years ago

8 0

Answer:

The answer is (1,7). Hope it helps

brilliants [131]2 years ago

6 0

3a + 6b = 45
2a - 2b = -12....multiply by 3
----------------
3a + 6b = 45
6a - 6b = - 36 ...(result of multiplying by 3)
---------------add
9a = 9
a = 1

3a + 6b = 45
3(1) + 6b = 45
3 + 6b = 45
6b = 45 - 3
6b = 42
b = 7

solution is : (1,7)

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