Question

23+2×{11-2×[3+40÷(15+x)]}=25
Va rog sa ma ajuți.

Answer 1

Răspuns: $\bf \red{x=5}$

Explicație pas cu pas:

$\bf 23+2\cdot\big\{11-2\cdot[3+40:(15+x)]\big\}=25$

$\bf 2\cdot\big\{11-2\cdot[3+40:(15+x)]\big\}=25-23$

$\bf 2\cdot\big\{11-2\cdot[3+40:(15+x)]\big\}=2~~~\bigg|:2$

$\bf 11-2\cdot[3+40:(15+x)]=1$

$\bf 11=1+2\cdot[3+40:(15+x)]$

$\bf 11-1=2\cdot[3+40:(15+x)]$

$\bf 10=2\cdot[3+40:(15+x)]~~~\bigg|:2$

$\bf 5=3+40:(15+x)$

$\bf 5-3=40:(15+x)$

$\bf 2=40:(15+x)$

$\bf 2\cdot(15+x)=40$

$\bf (15+x)=40:2$

$\bf 15+x=20$

$\bf x=20-15$

$\bf \red{\underline{x=5}}$

==pav38==

Baftă multă !