Question

va rog ex 4 punctul b .................​

Answer 1

Explicație pas cu pas:

$\dfrac{3x - 4}{0.2} = \dfrac{0.625}{0.875}$

$3x - 4 = 0.2 \cdot \dfrac{0.625}{0.875}$

$3x - 4 = \dfrac{2^{(2} }{10} \cdot \dfrac{625 ^{(125} }{875}$

$3x - 4 = \dfrac{1}{5} \cdot \dfrac{5}{7}$

$3x - 4 = \dfrac{1}{7} \iff 7(3x - 4) = 1$

$21x - 28 = 1 \iff 21x = 29 \\ \implies x = \dfrac{29}{21}$