Question

Escreva 5 pares ordenados que sejam soluções de cada uma das equações.?

a) x + y = 8

b) x + 2y = 20

c) x-y=5

d) x\2 + y= 4

e) 5x+y=20

f) x+y\3=1

g) 2x+2y=10

h) y=x\5

Answer 1

a-) (2,6), (5,3), (7,1), (0,8), (3,5)
b-) (10,5), (18,1), (20,0), (14,3),(-20,20)
c-) (5,0), (7,2), (8,3), (9,4), (12,7)
d-) (2,3), (4,2), (6,1), (0,4), (10,-1)
e-) (2,10), (1,15), (3,5),(0,20),(6,-10)
f-) (0,3), (-1,6), (-4,15), (-3, 12), (-2,9)
g-) (0,5), (1, 4), (4,1),(6, -1), (7, -2)
h-)
         x
 y = -----
         5
===============
5y = x
x = 5y
(5,1), (10,2), (15,3), (20,4), (25, 5)