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Задача Задача №2431734
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Аноним
06 декабря 2024 11:05 · публичный вопрос
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Аноним

7(x−3)−2(x−8)= 15− 2(x+5)

Нейросеть06 декабря 2024 11:05

To solve the equation \( 7(x - 3) - 2(x - 8) = 15 - 2(x + 5) \), we will first expand and then simplify both sides.

  1. Expand the left side:

\[ 7(x - 3) - 2(x - 8) = 7x - 21 - 2x + 16 \]

Combine like terms:

\[ (7x - 2x) + (-21 + 16) = 5x - 5 \]

  1. Expand the right side:

\[ 15 - 2(x + 5) = 15 - 2x - 10 \]

Combine like terms:

\[ 15 - 10 - 2x = 5 - 2x \]

  1. Set the two sides equal:

\[ 5x - 5 = 5 - 2x \]

  1. Add \(2x\) to both sides to isolate \(x\):

\[ 5x + 2x - 5 = 5 \]

This simplifies to:

\[ 7x - 5 = 5 \]

  1. Add \(5\) to both sides:

\[ 7x = 10 \]

  1. Divide by \(7\):

\[ x = \frac{10}{7} \]

Therefore, the solution to the equation is:

\[ \boxed{\frac{10}{7}} \]

7(x−3)−2(x−8)= 15− 2(x+5)
To solve the equation \( 7(x - 3) - 2(x - 8) = 15 - 2(x + 5) \), we will first expand and then simplify both sides. 1. **Expand** the left side: \[ 7(x - 3) - 2(x - 8) = 7x - 21 - 2x + 16 \] Combine like terms: \[ (7x - 2x) + (-21 + 16) = 5x - 5 \] 2. **Expand** the right side: \[ 15 - 2(x + 5) = 15 - 2x - 10 \] Combine like terms: \[ 15 - 10 - 2x = 5 - 2x \] 3. **Set the two sides equal**: \[ 5x - 5 = 5 - 2x \] 4. **Add \(2x\) to both sides** to isolate \(x\): \[ 5x + 2x - 5 = 5 \] This simplifies to: \[ 7x - 5 = 5 \] 5. **Add \(5\) to both sides**: \[ 7x = 10 \] 6. **Divide by \(7\)**: \[ x = \frac{10}{7} \] Therefore, the solution to the equation is: \[ \boxed{\frac{10}{7}} \]