December 2019 2 18 Report
1*) Resolva os sistemas :

x + y = 9
x - y = 3


2 x + 3 y = 12
4 x - 5 y = 2


5 x - 2 y = 8
3 x + 3 y = 3


x - y = 3
x + 2 y = 45


2*) Resolva as equações do 1°grau :


a) 5 x - 2 = 3 x + 4

b) 2 - 3 x = 5

c) 4 x + 11 = 1

d) 4 = 2 x + 4
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