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21 March, 22:36

Evaluate 5x - 2y + (7x - y) for x = 7 and y = - 2. 90 - 18 - 45 63

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  1. 21 March, 22:38
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    I was going to answer this question because I'm doing the same thing in Maths but it's already answered. He is correct though
  2. 21 March, 22:58
    0
    5x - 2y + (7x - y) ... x = 7 and y = - 2

    now we sub

    5 (7) - 2 (-2) + (7 (7) - (-2)

    35 + 4 + (49 + 2)

    35 + 4 + 51

    90 <===
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