Question

Estudo no 8ºAno B

E quero saber as repostas das seguintes perguntas


A)2x+160=240


B)3x+14=74


C)6(x+20)=90+3x


D)x -14=24

_

7


E)-x+6=18


F)4x-36=60

Answer 1

Resposta:

A) X= 40

B) X= 20

C) X= -10

D) X= 31

E)X= -12

F)X= 24

Explicação passo-a-passo:

A)2x+160=240

2x=240-160

2x/2=80/2

X=40

B)3x+14=74

3x=74-14

3x/3=60/3

X= 20

C)6(x+20) = 90+3x

6x+120=90+3x

6x-3x=90-120

3x/3=-30/3

X= -10

D) x-14 = 24-7

x=24-7+14

X= 31

E)-x+6=18

-x=18-6

-x/-x=12/-x

X= -12

F) 4x-36=60

4x=60+36

4x/4x=96/4

X= 24