ybnqweezzy ybnqweezzy

06-12-2020
Mathematics

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Determine the solution to the system. Solve by Substitution.
3a + b = 30
b = 3a

Respuesta :

melissa5shen melissa5shen

06-12-2020

Answer: (a, b) = (5, 15)

Substituting b for 3a in 3a + b = 30, we have 3a + 3a = 6a = 30. So a = 30/6 = 5. Then, b = 3a = 3(5) = 15. So the solution is (5, 15).

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