Question

1) aplicando o método da adição,resolva os sistemas:

a)x+y=9
x-y=3

b)x-y=1
x+y=7

c)x+y=2
3x-y=6

d)x+y=13
x-y=3

e)x-3y=-7
2x+3y=22

f)x-y=6
x+y=14
​

Answer 1

Resposta:

a) x+y-9 = 0

x+y-3 = 0

b) x+y-1 = 0

x+y-7 = 0

c) x+y-2 = 0

3x-y-6 = 0

d) x+y-13 = 0

x-y-3 = 0

e) x-3y+7 = 0

x+y-22 = 0

f) x-y-6 = 0

x+y-14 = 0