Question

1. 7x-12=30
2. 5x-18=77
3. 8x+12=36
4. x+45=72
5. x+27=82
6. x-13=66​

Answer 1

Explicación paso a paso:

hola ✓

para este tipo de ecuación de 1er grado lo único que se hace es cambiar el constante con distinto signo ✓

veamos ✓

1=

[tex]7x - 12 = 30[/tex]

[tex]7x = 30 + 12[/tex]

[tex]7x = 42[/tex]

[tex]x = 6[/tex]

2 =

[tex]5x - 18 = 77[/tex]

[tex]5x = 77 + 18[/tex]

[tex]5x = 95[/tex]

[tex]x = 19[/tex]

3 =

[tex]8x + 12 = 36[/tex]

[tex]8x = 36 - 12[/tex]

[tex]8x = 24[/tex]

[tex]x = 3[/tex]

4=

[tex]x + 45 = 72[/tex]

[tex]x = 27[/tex]

5=

[tex]x + 27 = 82[/tex]

[tex]x = 55[/tex]

6=

[tex]x - 13 = 66[/tex]

[tex]x = 79[/tex]

espero te sirva saludos

Answer 2

Respuesta:

1. x = 6

2. x = 19

3. x = 3

4. x = 27

5. x = 55

6. x = 79

Explicación paso a paso:

1.

7x - 12 = 30

7x = 30 + 12

7x = 42

x = 42 / 7

x = 6

2.

5x - 18 = 77

5x = 77 + 18

5x = 95

x = 95 / 5

x = 19

3.

8x + 12 = 36

8x / 4 + 12 / 4 = 36 / 4

2x + 3 = 9

2x = 9 - 3

2x = 6

x = 6 / 2

x = 3

4.

x + 45 = 72

x = 72 - 45

x = 27

5.

x + 27 = 82

x = 82 - 27

x = 55

6.

x - 13 = 66

x = 66 + 13

x = 79