Question

Calculeaza valoarea lui a din urmatoarea expresie 1000-[(185+a)x2-727+333x3]=0 dau coroana urgent prim metoda mersului invers

Answer 1

1000-[(185+a)x2-727+333x3]=0
1000-[(185+a)x2-727+999]=0
(185+a)x2-727+999=1000
(185+a)x2=1000+727-999
(185+a)x2=1727-999
(185+a)x2=728
(185+a)=728:2
185+a=364
a=364-185
a=179

Answer 2

1000-[(185+a)•2-727+999]=0
[(185+a)•2-727+999]=0+1000
[(185+a)•2-727+999]=1000
[(185+a)•2-727]=1000-999
[(185+a)•2-727]=1
[(185+a)•2]=727+1
[(185+a)•2]=728
(185+a)=728:2
(185+a)=364
a=364-185
a=179