X = libros ^ Y= Lapiceros
( 6 ) 5 x+ 4 y=3 2 (−5 ) 6 x +3 y=3 3
5 x+ 4 ( 3 )=32 5 x=20 → x=4
// + 9x = 27
Y =3
a 4 = b 5
(−1 ) 5 x+ 2 y =120 5 x+ 2 ( 15 ) =120 ( 5 ) x + y =3 3 3 y=45
5 x=120−30 x = 18
y=
45 3
y=15
L L+4 L1 = x + 4 (x + 4) + (x+4) + x + x = 28 4x + 8 = 28 X=5 =L L1 = 5 + 4 = 9 L=X
X + X + (X/3) = 14 X X
6 = =2 3 3
X
3X +3X + X = 42 7X = 42 X =6
x 3
X Y (X + 3) (Y+2) = A + 32 XY + 2X+ 3Y + 6 = A + 32
2X + 2Y = 22 (-) 2X + 3Y = 26
2X + 3Y +6 = 32 2X +3Y = 26
Y=4 2X + 3(4) = 32 X=7