Question

Calcular o valor numérico de 2a +b, para  para a= 1/2 e b= -2/3)

Answer 1

$\boxed{2a+b=2.\frac{1}{2}+(-\frac{2}{3})=1-\frac{2}{3}=\frac{3-2}{3}=\frac{1}{3}}$

Answer 2

Olá.

$\boxed{2a+b= 2 .\frac{1}{2} + (-\frac{2}{3})= 1- \frac{2}{3} = \frac{3-2}{3}= \boxed{\frac{1}{3}}}$