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b.) \( 3(2 x+5)-(4 x+6)=19 \)

Ask by Love Cruz. in Angola
Jan 23,2025

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Answer

A solução da equação é \( x = 5 \).

Solution

Para resolver a equação: \[ 3(2x + 5) - (4x + 6) = 19 \] **Passo 1: Distribuir os termos** Primeiro, distribua os números que estão fora dos parênteses pelos termos dentro deles: \[ 3 \cdot 2x = 6x \] \[ 3 \cdot 5 = 15 \] \[ -1 \cdot 4x = -4x \] \[ -1 \cdot 6 = -6 \] Substituindo esses valores na equação: \[ 6x + 15 - 4x - 6 = 19 \] **Passo 2: Combinar termos semelhantes** Agora, combine os termos que contêm \(x\) e os termos constantes: \[ 6x - 4x = 2x \] \[ 15 - 6 = 9 \] A equação simplificada fica: \[ 2x + 9 = 19 \] **Passo 3: Isolar o termo com \(x\)** Subtraia 9 de ambos os lados da equação para isolar o termo com \(x\): \[ 2x + 9 - 9 = 19 - 9 \] \[ 2x = 10 \] **Passo 4: Resolver para \(x\)** Divida ambos os lados da equação por 2 para encontrar o valor de \(x\): \[ \frac{2x}{2} = \frac{10}{2} \] \[ x = 5 \] **Conclusão:** A solução da equação é: \[ x = 5 \]

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Beyond the Answer

To solve the equation \( 3(2 x+5)-(4 x+6)=19 \), start by distributing the \(3\) across the first term: \( 3 \times 2x + 3 \times 5 = 6x + 15 \). Then tackle the subtraction: \( -(4x + 6) = -4x - 6 \). Now, combine all terms: \( 6x + 15 - 4x - 6 = 19 \). This simplifies to \( (6x - 4x) + (15 - 6) = 19 \), or \( 2x + 9 = 19 \). Next, subtract \(9\) from both sides to isolate the term with \(x\): \( 2x = 10 \), and finally, divide by \(2\) to find \(x = 5\). Check your work by substituting \(x = 5\) back into the original equation and confirming both sides equal \(19\).

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