Question

Calculează 5 xa-6:4+2x c, ştiind că:
a=5x4:2+ (27:3+ 10 x 3)
b= (48-23) x 8:10
= 305 - (14 x 8+170)​

Answer 1

Răspuns:

$\color{orangered} \LARGE \boxed{ \bf 5 \cdot a - b :4 + 2 \cdot c = 286}$

Explicație pas cu pas:

Salutare!

5 × a - b : 4 + 2 × c = ??

$\large \bf a = 5 \cdot 4 : 2 + (27 :3 + 10 \cdot3)$

$\large \bf a = 20 : 2 + (9+ 10 \cdot3)$

$\large \bf a = 10+ (9 + 30)$

$\large \bf a = 10+ 39$

$\Large\boxed{ \bf a = 49 }$

$\large \bf b = (48 - 23) \cdot 8 : 10$

$\large \bf b = 25 \cdot 8 : 10$

$\large \bf b = 200 : 10$

$\Large\boxed { \bf b = 20}$

$\large \bf c =305 - (14 \cdot8 + 170)$

$\large \bf c =305 - (112 + 170)$

$\large \bf c =305 - 282$

$\Large \boxed{\bf c =23}$

$\large \bf 5 \cdot a - b :4 + 2 \cdot c =$

$\large \bf 5 \cdot 49 - 20 :4 + 2 \cdot 23 =$

$\large \bf 245 - 5 + 46 =$

$\large \bf 240 + 46 =$

$\color{blue} \Large\boxed{ \boxed{ \bf 5 \cdot a - b :4 + 2 \cdot c = 286}}$

==pav38==