Respostas

2014-09-04T10:13:04-03:00
5(2x-1)=2x (?x+4






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2014-09-04T10:27:19-03:00
5×2x=10x 5×1= 5 2×x=2 2×4=8
10x-5=2x+8
10x-2x=8+5

8x=13
x=13/8