Calcule a)18/20=x/10 b)x/13=13/10.
C)2x/4=8/12 d)9/6=8x/4
E)x+1/2=3/4. F)7x/9=49/21
G)2x-1/3=4/5
Respostas
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a)18/20=x/10 b)x/13=13/10 c)2x/4=8/12
18.10=x.20 x.10=13.13 2x.12=8.4
180=20x 10x=169 24x=32
20x=80 169/10 x=32/24
x=9
e)x+1/2=3/4 f)7x/9-49/21 g)17/30
x+0.5=0.75 7x/9 -49/21=
x=0.75-0.5 7x - 7
x=0.25 9 3
18.10=x.20 x.10=13.13 2x.12=8.4
180=20x 10x=169 24x=32
20x=80 169/10 x=32/24
x=9
e)x+1/2=3/4 f)7x/9-49/21 g)17/30
x+0.5=0.75 7x/9 -49/21=
x=0.75-0.5 7x - 7
x=0.25 9 3
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