Question

) Na fórmula abaixo quando Q =5 , qual o valor de x? Q= \frac{3x+10}{8}

a 20
b 40
c 30
d 10

Answer 1

$\mathsf{Q=\dfrac{3x+10}{8}}\\\mathsf{3x+10=8Q}\\\mathsf{3x=8Q-10}\\\mathsf{x=\dfrac{8Q-10}{3}}\\\mathsf{quando~Q=5~teremos}\\\mathsf{x=\dfrac{8\cdot5-10}{3}}\\\mathsf{x=\dfrac{40-10}{3}}\\\mathsf{x=\dfrac{30}{3}}\\\huge\boxed{\boxed{\boxed{\boxed{\mathsf{x=10}}}}}\\\huge\boxed{\boxed{\boxed{\boxed{\mathsf{\maltese~~alternativa~~d}}}}}$

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