Răspuns :
Răspuns:
a + b + c + d = 720
b = a - 60 ⇒ a = b + 60
c = 3×a - 100 ⇒c = 3(b+60)-100 ⇒
⇒ c = 3×b+ 180 - 100 ⇒ c = 3×b + 80
d = 2×b - (100:2) = 2×b-50
a = |_____| +60 }
b = |_____| }
} = 720
c = |_____| |_____ |_____| +80 }
d = |_____| |_____| -50 }
avem 7 segmente egale +60+80 -50 = 720
720-(60+80-50) = 720-90 = 630
630:7 = 90 ( un segment)
a = 90+60 = 150
b = 90
c = 3×90+80 = 270+80 = 350
d = 2×90-50 = 180-50 = 130
R: a = 150; b = 90; c = 350; d = 130;