Răspuns :
a + b + c = 1000
a - x = 278 => a = 278 + x
b - x = 246 => b = 246 + x
c - x = 134 => c = 134 + x
278 + x + 246 + x + 134 + x = 1000
3x = 1000 - 658
3x = 342
x = 342 : 3
x = 114
a = 278 + 114
a = 392
b = 246 + 114
b = 360
c = 134 + 114
c = 248
a - x = 278 => a = 278 + x
b - x = 246 => b = 246 + x
c - x = 134 => c = 134 + x
278 + x + 246 + x + 134 + x = 1000
3x = 1000 - 658
3x = 342
x = 342 : 3
x = 114
a = 278 + 114
a = 392
b = 246 + 114
b = 360
c = 134 + 114
c = 248
a+b+c= 1000
a-x=278 ⇒ a=278+x
b-x =246 ⇒b=246+x
c-x =134 ⇒c=134+x
278+x+246+x+134+x=1000
3x+658=1000
3x= 1000-658
3x=342
x=114
a=278+114
a=392
b=246+114
b=360
c=134+114
c=248
V:a+b+c= 392+360+248=1000(adevarat)
a-x=278 ⇒ a=278+x
b-x =246 ⇒b=246+x
c-x =134 ⇒c=134+x
278+x+246+x+134+x=1000
3x+658=1000
3x= 1000-658
3x=342
x=114
a=278+114
a=392
b=246+114
b=360
c=134+114
c=248
V:a+b+c= 392+360+248=1000(adevarat)