1.Calcule o valor numericos das expresoes: a)a-b para: a=3 e b=1/2
b)7.y+5.y-8 para: y=3
c)6.(x-2)+5 para: x:8
d)4.(a+2b)-15 para: a=6 e b=5
2.Resolva as equaçoes:
a)x-3=20 b)x+5=100
c)x-10=5 d)x-100=2
e)3x=21 f)7x=35
g)x/4=2 h)x/100=1
i)2x+6=20
me ajudem e para amanha!!!!!!!!!
b)7.y+5.y-8 para: y=3
c)6.(x-2)+5 para: x:8
d)4.(a+2b)-15 para: a=6 e b=5
2.Resolva as equaçoes:
a)x-3=20 b)x+5=100
c)x-10=5 d)x-100=2
e)3x=21 f)7x=35
g)x/4=2 h)x/100=1
i)2x+6=20
me ajudem e para amanha!!!!!!!!!
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