URGENTE!!!
resolva as equaçôes
a)7y+5-y+8=31
b)5.(3-2a)=55
c)27=3.(x+3)
d)16x+2.(7x+8)-9=67
e)6.(4z+2)+7.(-5z+3)=66
f)12+(3x+6).(-7)-5=70
g)10-2x=3x
h)x-3=6+4x
i)(7x-8).2=6.(3x-4)
j)16x-6-7x=15+2x
Por favor me ajudem!
Respostas
respondido por:
2
a 7y-y=31-8 - 5 6 y = 18 y=18/6 y = 3
b 15-10a=55 -10a = 55-15 -10a = 40 -a = 40/10 -a= 4( -) a = -4
c 27 =3x + 9 3x + 9 = 27 3x=27-9 x=18/3 x= 6
d 16 x+14x+16 -9 = 67 16x +14 x= 67-16+9 30x = 60 x= 60/30 x=2
e 24z+12-35z+21=66 11z=66-12-21 11z= 33 z=33/11 z=3
f 12+ 21x+42-5=70 21x =70-12-42+5 21x=21 x=21/21 x=1
g 10 = 3x+2x 10 =5x 5x=10 x=10/5 x=2
h x-4x= 6+3 -3x = 9 -x=9/3 x= -3
i 14x - 16 = 18x-24 14x-18x=-24+16 -4x=-8 4x=8 x=8/4 x=2
j 16x-7x-2x=15 + 6 7x=21 x=21/7 x=3
b 15-10a=55 -10a = 55-15 -10a = 40 -a = 40/10 -a= 4( -) a = -4
c 27 =3x + 9 3x + 9 = 27 3x=27-9 x=18/3 x= 6
d 16 x+14x+16 -9 = 67 16x +14 x= 67-16+9 30x = 60 x= 60/30 x=2
e 24z+12-35z+21=66 11z=66-12-21 11z= 33 z=33/11 z=3
f 12+ 21x+42-5=70 21x =70-12-42+5 21x=21 x=21/21 x=1
g 10 = 3x+2x 10 =5x 5x=10 x=10/5 x=2
h x-4x= 6+3 -3x = 9 -x=9/3 x= -3
i 14x - 16 = 18x-24 14x-18x=-24+16 -4x=-8 4x=8 x=8/4 x=2
j 16x-7x-2x=15 + 6 7x=21 x=21/7 x=3
Duda1789:
muito obg
b)5.(3-2a)=55
c)27=3.(x+3)
d)16x+2.(7x+8)-9=67
e)6.(4z+2)+7.(-5z+3)=66
f)12+(3x+6).(-7)-5=70
g)10-2x=3x
h)x-3=6+4x
i)(7x-8).2=6.(3x-4)
j)16x-6-7x=15+2x
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