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E

endinovodich12

$311-x+82=46+x-21$

$2x=311+82-46+21$

$2x=368$

$x=184$

Bài này quá dễ mà bạn !
 
T

tranhainam1801

311-x+82=46+(x-21)
311-x+82=46+x-21
(311+82)-x=(46-21)+x
393=25+x+x
x.2=393-25
x2=368
x=368:2
x=184
 
S

satthuphucthu

$311 - x + 82 = 46 + (x-21)$

$311 - x + 82 = 46 + x + (-21)$

$( 311 + 82 ) - x = ( 46 - 21 ) + x$

$393 - x = 25 + x$

$2x = 393-25$

$2x = 368$

$x = 368:2 = 184$
 
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