October 2020 0 58 Report
Dadas as retas: r: 5X-12Y=42
s: 5X+16Y=56
t: 5X+20Y=M
O valor de M para que as três retas sejam concorrentes num mesmo ponto é:
a) 14. b) 28. c) 36. d) 48. e) 58
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