December 2019 1 61 Report
1) Simplifique as expressões, reduzindo os termos semelhantes.
a) a + 1 + a - 7
b) - 9x + 5m + 7x - 2m
c) xy ao quadrado + xy ao quadrado + x ao quadrado y
d) 3x + 5x + 0,2x - x + 2x
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