Răspuns:
[tex] \color{orangered} \LARGE \boxed{ \bf 5 \cdot a - b :4 + 2 \cdot c = 286}[/tex]
Explicație pas cu pas:
Salutare!
5 × a - b : 4 + 2 × c = ??
[tex] \large \bf a = 5 \cdot 4 : 2 + (27 :3 + 10 \cdot3) [/tex]
[tex] \large \bf a = 20 : 2 + (9+ 10 \cdot3) [/tex]
[tex] \large \bf a = 10+ (9 + 30) [/tex]
[tex] \large \bf a = 10+ 39 [/tex]
[tex] \Large\boxed{ \bf a = 49 }[/tex]
[tex] \large \bf b = (48 - 23) \cdot 8 : 10 [/tex]
[tex] \large \bf b = 25 \cdot 8 : 10[/tex]
[tex] \large \bf b = 200 : 10[/tex]
[tex] \Large\boxed { \bf b = 20}[/tex]
[tex] \large \bf c =305 - (14 \cdot8 + 170)[/tex]
[tex] \large \bf c =305 - (112 + 170)[/tex]
[tex] \large \bf c =305 - 282[/tex]
[tex] \Large \boxed{\bf c =23}[/tex]
[tex] \large \bf 5 \cdot a - b :4 + 2 \cdot c = [/tex]
[tex] \large \bf 5 \cdot 49 - 20 :4 + 2 \cdot 23 = [/tex]
[tex] \large \bf 245 - 5 + 46 = [/tex]
[tex] \large \bf 240 + 46 = [/tex]
[tex] \color{blue} \Large\boxed{ \boxed{ \bf 5 \cdot a - b :4 + 2 \cdot c = 286}}[/tex]
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