Question

85-4•[17+(8x-1):5]=5. mă puteți ajuta va rog repede ​

Answer 1

Răspuns: $\bf \red{\underline{x = 2}}$

Explicație pas cu pas:

Metoda mersului invers

$\bf 85-4\cdot \big[17+\big(8x-1\big):5\big]=5$

$\bf 85=5+4\cdot \big[17+\big(8x-1\big):5\big]$

$\bf 85-5=4\cdot \big[17+\big(8x-1\big):5\big]$

$\bf 80=4\cdot \big[17+\big(8x-1\big):5\big]$

$\bf 80:4= \big[17+\big(8x-1\big):5\big]$

$\bf 20= 17+\big(8x-1\big):5~~~~\bigg|\cdot5$

$\bf 20\cdot5= 17\cdot5+\big(8x-1\big)$

$\bf 100= 85+\big(8x-1\big)$

$\bf 100- 85=\big(8x-1\big)$

$\bf 15=8x-1$

$\bf 15+1=8x$

$\bf 16=8x$

$\bf x=16:8$

$\bf \red{\underline{x = 2}}$

==pav38==

Baftă multă !