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25 July, 19:10

Given the equation below what is the value of a+b?

1/2 (a+3) - b=-6

3a-2b=-5

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Answers (1)
  1. 25 July, 19:35
    0
    15

    Step-by-step explanation:

    1. 1/2 (a+3) - b=-6 ⇒ a+3-2b = - 12 ⇒ a-2b = - 15

    2. 3a-2b = - 5

    subtract the equations to eliminate 2b:

    3a+5 = a+15 2a = 10 a = 5

    then

    b = 10

    then

    a+b = 5+10 = 15
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