Răspuns :
1) ... 3x + 175 = 814 => 3x = 814-175 ; 3x = 639 deci: x = 213 ;
2) ... 360 - (2a+64) = 278
2a+64 = 360-278
2a = 360-278-64
2a = 18
a = 9 ;
2) ... 360 - (2a+64) = 278
2a+64 = 360-278
2a = 360-278-64
2a = 18
a = 9 ;
I. 3a+175=814
3a=814-175
3a=639
a=639:3
a=213
II.360-(2a+64)=278
2a+64= 360-278
2a+64=82
2a=82-64
2a=18
a=18:2
a=9
3a=814-175
3a=639
a=639:3
a=213
II.360-(2a+64)=278
2a+64= 360-278
2a+64=82
2a=82-64
2a=18
a=18:2
a=9