Question

resolva as equações de 1° grau:

me ajudem por favor coloquem o cálculo ​

Answer 1

Resposta:

i) x=-250/39

J) x=20/3

K) x=-5/18

L) x=0

Explicação passo-a-passo:

i)10(4×-10)+2(×-15)=120+×-138x-130=120+×

10(4×-10)+2(×-15)=120+×-138x-130=+20+×

10(-4x-10)

-10×4x-10×10

-40x-10×10

-10×4x-10×10

-40x-100

10(-4x-10)+2(x-15)=120+×

-40x-100+2(×-15)=120+×

10(-4x-10)+2(x-15)=120+×

2(x-15)

2x-2×15

2x-30

10(-4x-10)+2(×-15)=120+×

-40x-100+2x-30=120+×

-40x2x

(-40+2)×

-38x

-40x-100+2×-30=120+x

-38×-100-30=120+x

-40x-100+2x-30=120+x

-100-30

(-100+30)

-130

-40x-100+2x-30=120+x

-38x-130=120+×

-38x-130-x=120+x-x

-38x-130-x=120

-38x-130=120+x

-38x-130-x=120

-38x-130-x+130=120+130

-38x-x=120+130

-38x-130=120+×

-38x-x=120+130

-38x-x

-38x-1x

(-38-1)x

-39x

-38x-x=120+130

-39x=120+130

-38x-x=120+130

-39x=250

-39x÷(-39)=250÷(-39)

x=250÷(-39)

-39x÷(-39)=250÷(-39)

x=-250÷39

-39x÷(-39)=250÷(-39)

x=-250/39

-39x=250

x=-250/39

Resposta

x=-250/39

J) 90×+10(15×-50)=1100

90×+10(15×-50)=1100

10(15x-50)

10×15x-10×50

150x-10×40

10×15x-10×50

150x-500

90×+10(15x-50)=1100

90x+150x-500=1100

90x+150x

(90+150)x

240x

90x+150x-500=1100

240x-500=1100

240x-500+500=1100+500

240x=1100+500

240x-500=1100

240x=1100+500

240x=1600

240x÷240=1600÷240

x=1600÷240

240x÷240=1600÷240

x=1600/240

x=1600/240 risque os dois numeros 1600 e 240

x=20/3

24x=1600

x=20/3

Resposta

x=20/3

K)3/2(x/1+1/2)=1/3

3/2(x/1+1/2)=1/3

2/3×3/2×(x/1+1/2=2/3×1/3

2/3×3/2×(x/1+1/2=2/3×1/3 risque os dois primeiros numeros 2

1/3×3(x/1+1/2)2/3×1/3

2/3×3/2×(x/1+1/2)=2/3×1/3 aqui risque os dois primeiros primeiros numeros 3

x/1+1/2=2/3×1/3

2/3×2/3×(x/1+1/2)=2/3×1/3

x/1+1/2=2/9

2/3×(x/1+1/2=1/3

x/1+1/2=2/9

x+1/2=2/9

18(x+1/2)=18×2/9

18x+18×1/2=18×2/9

18(x+1/2)=18×2/aqui resque o segundo numero 18 e o último numero 9

18x+18×1/2=2×2

18x+18×1/2=2×2 aqui risque o segundo numero 18 e o primeito numero 2

18x+9=2×2

18x+18×1/2=2×2

18x+9=4

x+1/2=2/9

18x+9=4

18x+9-9=4-9

18x=4-9

18x+9=4

18x=4-9

4-9

-(9-4)

-5

18x=4-9

18x÷18=-5÷8

18x÷18=-5÷18

x=÷18

18x÷18=-5÷18

x=-5/18

18x=-5

x=-5/18

Resposta

x=-5/18

L)4/1(x/2-x/3)=x/1×3/4

4/1(x/2-x/3)=x/1×3/4

x/2-x3

3x/3×2-x/3

x/2-x/3

3x/3×2-2x/2×3

3x/3×2-2x/2×3

3x/6-2x/2×3

3x/3×2--2x/2×3

3x/6-2x/6

3x-2x/6

x/6

1/6x

4/1×(x/2-x/3)=x/1×3/4

4/1×1/6x=×/1×3/4

4/1×(x/2-x/3)x/1×3/4

x/1×3/4

x×3/1×4

3x/1×4

x×3/1×4

3x/4

4/1×(x/2-x/3)=x/1×3/4

4/1×1/6x=3x/4

4/1×1/6x=3x/4 aqui risque o numero 6

2/1×1/3x=3x/4

2/1×1/3x

2×1/1×3×x

2/1×3×x

2×1/1×3×x

2/3x

2/1×1/3x=3x/4

2/3x=3x/4

2x/3=3x/4

4×2x/3=3x 2x/3=3x/4

4×2x=3×3x

2x/3=3x/4

8x=9x

8x-9x=9x-9x

8x-9x=0

8x=9x

8x-9x=0

8x-9x

(-8-9)x

-1x

-x

8x-9x=0

-x=0

-1x(-x)=-1×0

x=-1×0

-1x(-x)=-1×

x=0

x=-1×0

-x=0

x=0

Resposta

x=0

Explicação espero ter te ajudado e me desculpe se estiver errado só tentei te ajudar

eu só não consigo entender muito os numeros que estão na foto