Question

1.Resolva as equação a seguir:
a)18x-43=63
b)23x-16=14-17x
c)10y-5(1+y)=3(2y-2)-20
d)x(x+4)+x(x+2)=2x2+12
e)(x-5)/10+(1-2x)/5=(3-x)/4
f)4x(x+6)-x2=5x2


2.Determine o valor do (x) na equação a seguir aplicando as técnicas resolutivas
a)3-2*(x+3)=x-18
b)50+(3x-4)=2*(3x-4+26)

3.Qual a raíz da equação?
a)7x-2=-4x+5

me ajudaaaa


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Answer 1

Explicação passo-a-passo:

1.Resolva as equação a seguir:

18x-43=63

18x=63+43

18x=106

x=106/18

x=106/18{÷2}

x=>53/9 >>> resposta

___________________________

23x-16=14-17x

23x+17x=14+16

40x=30

x=30/40

x=30/40{÷2}

x=15/20

x=15/20{÷5}

x=3/4 >>> resposta

___________________________

10y-5(1+y)=3(2y-2)-20

10y-5-5y=6y-6-20

5y-5=6y-26

5y-6y=-26+5

-y=-21

-y=-21(-1)

y=>21 >>> resposta

___________________________

x(x+4)+x(x+2)=2x²+12

x²+4x+x²+2x=2x²+12

2x²+6x=2x²+12

2x²-2x²+6x=12

6x=12

x=12/6

x=>2 >>> resposta

___________________________

(x-5)/10+(1-2x)/5=(3-x)/4

2(x-5)+4(1-2x)=5(3-x)

2x-10+4-8x=15-5x

-6x-6=15-5x

-6x+5x=15+6

-x=21

-x=21(-1)

x=>-21 >>> resposta

___________________________

4x(x+6)-x²=5x²

4x²+24x-x²=5x²

3x²+24x=5x²

3x²-5x²+24x=0

-2x²+24x=0

-2x²+24x=0{÷2}

-x²+12x=0

x(-x+12)=0

-x+12=0

-x=0-12

-x=-12

-x=-12(-1)

x=>12

S=>{ 0 e 12} >>> respostas

___________________________

2.Determine o valor do (x) na equação a seguir aplicando as técnicas resolutivas

3-2*(x+3)=x-18

3-2x-6=x-18

-3-2x=x-18

-2x-x=-18+3

-3x=-15

-3x=-15(-1)

3x=15

x=15/3

x=>5 >>> resposta

___________________________

50+(3x-4)=2*(3x-4+26)

50+3x-4=6x-8+52

3x+46=6x+44

3x-6x=44-46

-3x=-2

-3x=-2(-1)

3x=2

x=2/3 >>> resposta

___________________________

7x-2=-4x+5

7x+4x=5+2

11x=7

x=7/11 >>> resposta