1) Resolva os sistemas pelo método da substituição, sendo u=q. a) x-y=5
x+y=7
b) x-y=2
2x+y=4
c) x+y=3
2x+3y=8
d) x-3=0
2x-y=1
e) 3x+y=5
2x+y=4
f) x=y-2
2x+y=-1
g) 7x-3y=6
2x=y+3
h) x+y=6
x+y/5=2
i) 4x=2y
2x+3y=1
j) x-y-2=0
2x+y-7=0
x+y=7
b) x-y=2
2x+y=4
c) x+y=3
2x+3y=8
d) x-3=0
2x-y=1
e) 3x+y=5
2x+y=4
f) x=y-2
2x+y=-1
g) 7x-3y=6
2x=y+3
h) x+y=6
x+y/5=2
i) 4x=2y
2x+3y=1
j) x-y-2=0
2x+y-7=0
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