1) Resolva os seguintes sistemas do 1º grau, Sendo V=Q (usando qualquer método). URGENTE! a) x-y=1
x+y=9
2x=

b) x+y=8
x-y=2

c) x+3y=1
2x-y=5

d) 3x-y=7
4x-5y=2

e) x+3y=1
5x+3y=17
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