Question

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

Answer 1

Răspuns:

Sper ca înțelegi din poză

Answer 2

Răspuns: $\red{\boxed{\bf x = 5}}$

Explicație pas cu pas:

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

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

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

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

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

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

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

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

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

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

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

$\bf 15+x=20$

$\bf x=20-15$

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

Bafta multa !