Question

jumatatea numarului x intrece cu 6 jumatatea numarului y . Stiind ca suma celor doua numere este 20 afla numarul x si numar y

x = y=

va rog dau coroanaa !

Answer 1

1/2 x=1/2y+6|×2
x+y=20.

2•1/2x=2(1/2y+6)
x+y=20

x=y+12
(y+12)+y=20

x=y+12
y+12+y=20

x=y+12
2y+12=20

x=y+12
2y=20-12

x=y+12
2y=8

x=y+12
y=8/2=4

y=4
x=4+12=16

R: x=16; y=4

Answer 2

X:2 = Y:2+6 |×2
X = Y+12
X+Y = 20
X |____|+12
Y |____|
avem 2 segmente egale +12 = 20
20 -12 = 8
8 :2 = 4 (un segment egal)
X = 4+12 = 16
Y = 4

Verificare:
16+4 = 20
16:2 = 4:2+6
8 = 2+6
8 = 8

X = 16
Y = 4