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6 November, 12:58

Solve for z.

42 = - 7 (z - 3)

z = ?

+4
Answers (2)
  1. 6 November, 13:14
    0
    You divide by - 7 on both sides then add three to both sides and the answer is - 3
  2. 6 November, 13:15
    0
    To solve for z you need to get it by itself and have the other half of the equal sign simplified.

    42=-7 (z-3)

    42=-7z+21 (you would distribute the - 7 through the parentheses.)

    21=-7z (you would then subtract 21 from both sides)

    -3=z (last your would divide - 7 to both sides to get z by itself)

    z=-3
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