Question

c) 8x-5=4x-17; f) 39-9x=21-3x.​

Answer 1

Răspuns:

c) x = -3; f) x = 3.

Explicație pas cu pas:

c) 8x-5=4x-17 => 8x-4x = -17+5 => 4x = -12 => x = -3;

f) 39 - 9x = 21-3x => -9x + 3x = 21-39 => -6x = -18 => 6x = 18 => x = 3.

Answer 2

Răspuns:

$\bf c)~~ \red{x= -3}$

$\bf f)~~ \pink{x = 3}$

Explicație pas cu pas:

$\bf c) ~8x-5=4x-17$

$\bf 8x-5-4x=-17$

$\bf 4x-5=-17$

$\bf 4x=-17+5$

$\bf 4x=-12$

$\bf x=-12:4\implies \red{\underline{x= -3}}$

_____________________

$\bf f) ~39-9x=21-3x$

$\bf 39-9x+3x=21$

$\bf 39-6x=21$

$\bf -6x=21-39$

$\bf -6x=-18$

$\bf x=-18:(-6)\implies \pink{\underline{x = 3}}$

==pav38==

Baftă multă !