Question

Qual o valor de x nas equações seguintes a) 3x/2-5=x/4 b) x/2+5=2x/3-x​

Answer 1

Resposta:

Explicação passo-a-passo:

Vamos resolver as equações.

a)

$\dfrac{3x}{2}-5=\dfrac{x}{4}\\\\\dfrac{6x-20}{4}=\dfrac{x}{4}\\\\6x-x=20\\5x=20\\\\x=\dfrac{20}{5}\\\\\boxed{x=4}$

b)

$\dfrac{x}{2}+5=\dfrac{2x}{3}-x\\\\\dfrac{3x+30}{6}=\dfrac{4x-6x}{6}\\\\3x-4x+6x=-30\\5x=-30\\\\x=\dfrac{-30}{5}\\\\\boxed{x=-6}$