Question

tarefa de 1 grau com 6 perguntas, valendo 1 ponto cada:

1: 11x-13=20
2: 17x+50=7x
3: 9x-8=5x+20
4: 12x+21=10x+16
5: 4x+2(3-x)=46
6: 2x/5=6/3​

Answer 1

Resposta:

1 ) 3

2) -5

3) 3

4) -5/2

5) 20

6) 5

Explicação passo a passo:

1 : 11x-13 =20

11x = 20+13

11x =33

x= 3

2: 17x+50 =7x

17x-7x = -50

10x = -50

x= -50/10

x= -5

3: 9x+8 = 5x+20

9x-5x=20-8

4x=12

x=3

4: 12x+21= 10x+16

12x-10x=16-21

2x= -5

x= -5/2

5: 4x+2(3-x) = 46

4x+6-2x=46

2x= 46-6

2x=40

x=20

6: 2x/5 = 6/3

x= 6/3 . 5/2

x=5