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\( 10 x-1=15-6 x \) \( \frac{3 x}{2}+5=\frac{5 x}{2}-1 \) b) \( 1 \frac{1}{2} z-2=3 \frac{1}{4} z-9 \) c) d) \( 9 x-8=11 x-10 \)

Ask by Hardy Schmidt. in the United Arab Emirates
Jan 20,2025

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Answer

1. \( x = 1 \) 2. \( x = 6 \) b) \( z = 4 \) d) \( x = 1 \)

Solution

好的,下面我们依次解答这些方程。 ### 1. 方程 \(10x - 1 = 15 - 6x\) **步骤:** \[ \begin{align*} 10x - 1 &= 15 - 6x \\ 10x + 6x &= 15 + 1 \quad (\text{将} -6x \text{移到左边,同时将} -1 \text{移到右边}) \\ 16x &= 16 \\ x &= \frac{16}{16} \\ x &= 1 \end{align*} \] **解:** \( x = 1 \) --- ### 2. 方程 \(\frac{3x}{2} + 5 = \frac{5x}{2} - 1\) **步骤:** \[ \begin{align*} \frac{3x}{2} + 5 &= \frac{5x}{2} - 1 \\ \text{两边同时乘以2:} \\ 3x + 10 &= 5x - 2 \\ 3x - 5x &= -2 - 10 \quad (\text{将} 5x \text{移到左边,同时将} 10 \text{移到右边}) \\ -2x &= -12 \\ x &= \frac{-12}{-2} \\ x &= 6 \end{align*} \] **解:** \( x = 6 \) --- ### b) 方程 \(1 \frac{1}{2} z - 2 = 3 \frac{1}{4} z - 9\) **步骤:** 首先将带分数转换为假分数: \[ 1 \frac{1}{2} z = \frac{3}{2} z, \quad 3 \frac{1}{4} z = \frac{13}{4} z \] 方程变为: \[ \frac{3}{2} z - 2 = \frac{13}{4} z - 9 \] 两边同时乘以4,消去分母: \[ 4 \left( \frac{3}{2} z \right ) - 4 \times 2 = 4 \left( \frac{13}{4} z \right ) - 4 \times 9 \\ 6z - 8 = 13z - 36 \] 将 \(6z\) 移到右边,\(-36\) 移到左边: \[ -8 + 36 = 13z - 6z \\ 28 = 7z \\ z = \frac{28}{7} \\ z = 4 \] **解:** \( z = 4 \) --- ### d) 方程 \(9x - 8 = 11x - 10\) **步骤:** \[ \begin{align*} 9x - 8 &= 11x - 10 \\ 9x - 11x &= -10 + 8 \quad (\text{将} 11x \text{移到左边,同时将} -8 \text{移到右边}) \\ -2x &= -2 \\ x &= \frac{-2}{-2} \\ x &= 1 \end{align*} \] **解:** \( x = 1 \) --- 如果你有更多题目或者需要进一步的解释,请告诉我!

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Let's solve these equations step-by-step! For the first equation, \( 10x - 1 = 15 - 6x \): 1. Add \( 6x \) to both sides: \( 10x + 6x - 1 = 15 \) 2. Combine like terms: \( 16x - 1 = 15 \) 3. Add 1 to both sides: \( 16x = 16 \) 4. Divide by 16: \( x = 1 \). Moving to the second equation, \( \frac{3x}{2} + 5 = \frac{5x}{2} - 1 \): 1. Subtract \( \frac{3x}{2} \) from both sides: \( 5 = \frac{5x}{2} - \frac{3x}{2} - 1 \) 2. Combine like terms: \( 5 = \frac{2x}{2} - 1 \) 3. Simplify: \( 5 + 1 = x \) which gives \( x = 6 \). Next, let’s tackle \( 1 \frac{1}{2} z - 2 = 3 \frac{1}{4} z - 9 \), or convert to improper fractions: 1. \( \frac{3}{2} z - 2 = \frac{13}{4} z - 9 \). 2. Clear the fractions by multiplying every term by 4: \( 6z - 8 = 13z - 36 \). 3. Rearranging gives \( 6z - 13z = -36 + 8 \), thus \( -7z = -28 \). 4. Divide by -7: \( z = 4 \). Last, for \( 9x - 8 = 11x - 10 \): 1. Rearranging, \( 9x - 11x = -10 + 8 \) leads to \( -2x = -2 \). 2. Divide by -2, resulting in \( x = 1 \). So the solutions are \( x = 1 \), \( x = 6 \), \( z = 4 \), and \( x = 1 \) respectively. Happy solving!

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