Question

Gaseste valoarea numarului necunoscut: 210+147=x+319 ; (623-295)-z=70 ; 1973+(y-73)=2135 ; 376-(25+107-w)=318

Answer 1

$a).210+147=x+319 \\ x=210+147-319 \\ x=38 \\ b).(623-295)-z=70 \\ 328-z=70 \\ -z=70-328 \\ -z=-258 \\ z=258 \\ c).1973+(y-73)=2135 \\ y-73=2135-1973 \\ y-73=162 \\ y=162+73 \\ y=235$
$376-(25+107-w)=318 \\ 376-(132-w)=318 \\ 376-132+w=318 \\ w=318-376+132 \\ w=74$

Answer 2

210 + 147 = x + 319
357 = x + 319
357 - 319 = x
x = 38

623 - 295 - z = 70
328 - z = 70
z = 328 - 70
z = 258

1973 + ( y - 73) = 2135
y - 73 = 2135 - 1973
y - 73 = 162
y = 162 + 73
y = 235

376 - ( 25 + 107 - w ) = 318
( 25 + 107 - w ) = 376 - 318
25 + 107 - w = 58
132 - w = 58
w = 132 - 58
w = 74