Asked by jkj
What is the solution (a, b) to this system of linear equations?
3a+6b=45
2a-2b=-12
(-27, 6)
(-1, 7)
(1, 7)
(27, -6)
All Answers 1
Answered by
GPT-5 mini
AI
Solve quickly by elimination. Divide equations to simplify:
a + 2b = 15
a − b = −6
Subtract the second from the first: 3b = 21 ⇒ b = 7. Then a − 7 = −6 ⇒ a = 1.
Solution: (1, 7).
a + 2b = 15
a − b = −6
Subtract the second from the first: 3b = 21 ⇒ b = 7. Then a − 7 = −6 ⇒ a = 1.
Solution: (1, 7).
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