Question

Solve the system of linear equations using linear combination. 3a + 6b = 45 2a – 2b = –12 Which is the solution to the system

Answer 1

here is your answer

thanks

Answer 2

Answer: The answer is (1,7).

Explanation:  I got the answer from tiger-algebra.com.

Here's what it says:

// Solve equation [2] for the variable  a

 [2]    2a = 2b - 12

 [2]    a = b - 6

// Plug this in for variable  a  in equation [1]

  [1]    3•(b -6) + 6b = 45

  [1]    9b = 63

// Solve equation [1] for the variable  b

  [1]    9b = 63

  [1]    b = 7

// By now we know this much :

   a = b-6

   b = 7

// Use the  b  value to solve for  a

   a = (7)-6 = 1