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colly3
@colly3
March 2022
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Me ajudem por favor nos exercícios da foto
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Nat14
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a) x+5=18 b)3+y=2 c)4z=12 d)y+9=y+2y e)2m= -4
x=18-5 3-2= -y z= 12/4 9=3y-y m= -4/2 = -2
x=13 1= -y z= 3 9=2y
-1=y y=9/2 = 4,5
f)-5t = 25 . (-1) g)2x+x=7-10x h)3-x=3-4 i)2x+8=x+6 j)x+12=2x+9
5t= -25 3x=7-10x -x=3-4+3 2x-x=6-8 12-9=2x-x
t= -25/5 = -5 13x=7 -x=-4 . (-1) x=-2 3=x
x=7/13 = 0,583 x=4
3) 1 pois Marcia tinha apenas 13 reais e se fosse comprar 2 revistas ia dar 14 reais , ou seja , ia faltar 1 real
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a) x+5=18 b)3+y=2 c)4z=12 d)y+9=y+2y e)2m= -4
x=18-5 3-2= -y z= 12/4 9=3y-y m= -4/2 = -2
x=13 1= -y z= 3 9=2y
-1=y y=9/2 = 4,5
f)-5t = 25 . (-1) g)2x+x=7-10x h)3-x=3-4 i)2x+8=x+6 j)x+12=2x+9
5t= -25 3x=7-10x -x=3-4+3 2x-x=6-8 12-9=2x-x
t= -25/5 = -5 13x=7 -x=-4 . (-1) x=-2 3=x
x=7/13 = 0,583 x=4
3) 1 pois Marcia tinha apenas 13 reais e se fosse comprar 2 revistas ia dar 14 reais , ou seja , ia faltar 1 real