Respostas

2014-04-03T13:57:45-03:00
2x+4*2=22
2x=22-8
2x=14
x=14/2
x=7
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2014-04-03T13:58:27-03:00
2x+4y=22 (y=2)
2x+4.2=22
2x+8=22
2x+8-22=
2x-14=
2x=14
x=14/2
x= 7

Logo x= 7 e y=2 (7,2)
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