Respostas

2013-11-19T19:40:19-02:00
x+y=60
5x-y=210

6x=270
x=270/6
x=45

Cálculo de Y
5x-y=210
5 . 45 -y=210
225-y=210
-y=210-225
y= -210+225
y=15
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2013-11-19T19:41:23-02:00
X + y = 60
x = 60 - y

5x - y = 210
5(60 - y ) - y = 210
300 - 5y -y = 210
6y = 90
y = 15

x = 60 - 15
x = 45.
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