Question

conjunto solução de 3x/4 - x/3 =5

Answer 1

Resposta:

x = 12

Explicação passo-a-passo:

Sendo a equação $\dfrac{3x}{4} -\dfrac{x}{3} =5$, tem-se que:

$\dfrac{3x}{4} -\dfrac{x}{3} =5\\\\\dfrac{3x}{4} \cdot \dfrac{3}{3}-\dfrac{x}{3} \cdot \dfrac{4}{4}=5\\\\\\\dfrac{9x}{12} -\dfrac{4x}{12} =5\\\\\\\dfrac{9x-4x}{12}=5\\\\\dfrac{5x}{12}=5\\\\\\5x=12\cdot5\\x=12$