Please help me solve this problem: 42/-(2x-7)=2?

👨🏻‍🏫 學術台數學

[匿名]

2017-01-04 7:18 am

回答 (4)

用戶65385

2017-01-04 7:34 am

✔ 最佳答案

Start by multiplying both sides by -(2x - 7):

42 = -2(2x - 7) = 14 - 4x

4x = - 28

x = - 7

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用戶57799

2017-01-04 7:52 am

21/(7-2x) = 1
7-2x = 21
x = -7

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[匿名]

2017-01-04 7:53 am

42/-(2x-7)=2 => -(2x-7)=42/2 => 2x-7=-21 => 2x=-21+7 => 2x=-14 => x=-14/2 => x=-7

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[匿名]

2017-01-04 7:49 am

42 / (-(2x - 7) ) = 2
So 21 / (-(2x - 7) ) = 1,
21 = -(2x - 7),
2x - 7 = -21,
2x = -14 .
So x = 7 .

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