Respostas

2014-05-13T20:53:59-03:00
A ) 2 (m+4)+8=3+M
2m+8+8=3+m
2m+16=3+m
2m=3+m-16
2m-m=3-16
m=-13

B)5x+14+2x=2x+108-x
5x+2x
=2x+108-x-14
5x+2x-2x+x=108-14
6x
=94
x
=94/6
x
= 16

C)14x+10x=25+5
24x
=30
x
=30/24
x
=1,25

D)15x+30x-20=10x
15x+30x
=10x+20
15x+30x-10x
=20
35x
=20
x
=20/35
x
=0,6











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