resolvam as equaçoes 18x-43=65 23x-16=14-17 4x-8=10 7x-2=4x+5
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18x-43=65
-18x= -43-65
-18x= -108 (-1)
18x= 108
x= 108/18
x=6
23x -16= 14 -17
23x - 16= -3
23x= -3+16
23x=13
x=13/23
x=0,56...
4x-8=10
4x=10+8
4x=18
x=18/4
x= 4,5
7x-2=4x+5
7x-4x=5+2
3x=7
x=7/3
x=2,333...
-18x= -43-65
-18x= -108 (-1)
18x= 108
x= 108/18
x=6
23x -16= 14 -17
23x - 16= -3
23x= -3+16
23x=13
x=13/23
x=0,56...
4x-8=10
4x=10+8
4x=18
x=18/4
x= 4,5
7x-2=4x+5
7x-4x=5+2
3x=7
x=7/3
x=2,333...
marcelasousabispo:
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