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14 May, 23:42

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

(-2,-5)

(-1,-7)

(1,7)

(2,5)

+4
Answers (2)
  1. 15 May, 02:24
    0
    The answer is (1,7) on edgenuity.

    a=1

    b=7
  2. 15 May, 03:40
    0
    Reduce the equations to their lowest terms: a+2b=15, a-b=-6 and subtract these two equations from one another:

    3b=21, so b=7 and a=15-2b=15-14=1. So a=1 and b=7.
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