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發問:
詳列步驟，謝謝 7 times b is greater than 3 times b by 12.Find the value of b. 更新: z+5=3(z+5) 更新 2: The value of a is 4 times that of b.If their sum is 45,find the value of a. If the sum of two consecutive even numbers is 46,find the values of these two numbers.
最佳解答:
1. 7 b - 3 b = 1 2 => 4 b = 1 2 => 4 b / 4 = 1 2 / 4 => b = 3 2. z + 5 = 3 ( z + 5 ) => z + 5 - 5 = 3 ( 5 ) + 3 z - 5 => z = 1 5 + 3 z - 5 => z = 1 0 + 3 z => z - z = 1 0 + 3 z - z => 0 = 1 0 + 2 z => 0 - 1 0 = 1 0 + 2 z - 1 0 => - 1 0 = 2 z => - 1 0 / 2 = 2 z / 2 => - 5 = z 3. a = 4 b a + 4 b = 4 5 => a + a = 4 5 => 2 a = 4 5 => 2 a / 2 = 4 5 / 2 => a = 2 2 . 5 4. a = even numbers a + ( a + 2 ) = 4 6 => 2 a + 2 = 4 6 => 2 a + 2 - 2 = 4 6 - 2 => 2 a = 4 4 => 2 a / 2 = 4 4 / 2 => a = 2 2 => a + 2 = 2 4 the values of these two numbers: 22 , 24 Hope I Can Help You^^
其他解答:
here is the steps : 7b - 3b = 12 4b = 12 b = 12/4 b = 3
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