Question

aflați valoarea expresiei​

Answer 1

Răspuns:

$\bf a = -3-2 \cdot(-6)$

$\bf a = -3+2 \cdot6$

$\bf a = -3+12$

$\purple{\bf \underline{~a = 9~}}$

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$\bf \dfrac{4}{7}: \dfrac{12}{21} = \dfrac{\not4}{\not7}\cdot \dfrac{\not21}{\not12} =\dfrac{1}{1}\cdot \dfrac{\not3}{\not3} =\dfrac{1}{1}\cdot \dfrac{1}{1}=\red{\boxed{\bf ~1~}}$

Answer 2

Răspuns:

a=-3-2(-6)

a=-3+12

a=9

4/7:12/21=4/7·21/12=84/84=84:84=1