Question

ma poate ajuta cineva la cele 3 exercitii?
1)
$\frac{5 \times }{4} = \frac{20}{ \times }$
2)
$\frac{ \times }{2} = \frac{4 - 3 \times - { \times }^{2} }{2 \times - 6}$
3)
$\frac{9 - \times }{16} = 1$

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Answer 1

1) 5x*x=4*20
5x*x=80/:5
x*x=16
x poate fi 4