Question

1) 3x+12=21
2) x/3-4=6
3) 2(x+1)=12
4) (x-1/4)-3=0
5) 5(2x+4)=
6) 5•2x+4=
7) 7x=21
Me ajudem é pra hojeee

Answer 1

Olá, tudo bem?

1) 3x+12=21

3x = 21 - 12

x = 9/3

x = 3

2) x/3-4=6

x/3 - 4 = 6

x/3 = 6 + 4

x = 10/3

3) 2(x+1)=12

2x + 2 = 12

2x = 12 -2

x = 10/2

x = 5

4) (x-1/4)-3=0

(x-1)/4 = 3

x-1 = 3 . 4

x - 1 = 12

x = 13

5) 5(2x+4)=

10x + 10 = 0

10x = -10

x = -10/10

x = -1

6) 5•2x+4=

10x + 4 = 0

10x = -4

x = -4/10

x = -2/5

7) 7x=21

x = 21/7

x = 3