Question

formas matematicas:
3 ( x- 2) = 60 =??
4 ( x- 4) =48 =??
6- 3x = 8 - 4x =??
10 - 5x =40 - 7x =??
5x +4= 7x - 4 =??
7x - 2x= 9x -12 = ??
9 (x - 1) - 5(x + 3)= 12 =??
7 ( x + 3) + 8 ( x - 4) = 64 = ??

Answer 1

Respuestas y Explicación paso a paso:

1.

3(x - 2) = 60

3x - 6 = 60

3x = 60 + 6

3x = 66

x = 66/3

x = 22

2.

4(x - 4) = 48

4x - 16 = 48

4x = 48 + 16

4x = 64

x = 64/4

x = 16

3.

6 - 3x = 8 - 4x

4x - 3x = 8 - 6

x = 2

4.

10 - 5x = 40 - 7x

7x - 5x = 40 - 10

2x = 30

x = 30/2

x = 15

5.

5x + 4 = 7x - 4

4 + 4 = 7x - 5x

8 = 2x

x = 8/2

x = 4

6.

7x - 2x = 9x - 12

5x = 9x - 12

12 = 9x - 5x

12 = 4x

x = 12/4

x = 3

7.

9(x - 1) - 5(x + 3) = 12

9x - 9 - 5x - 15 = 12

9x - 5x - 15 - 9 = 12

4x - 15 - 9 = 12

4x - 24 = 12

4x = 12 + 24

4x = 36

x = 36/4

x = 9

8.

7(x + 3) + 8(x - 4) = 64

7x + 21 + 8x - 32 = 64

7x + 8x + 21 - 32 = 64

15x + 21 - 32 = 64

15x - 11 = 64

15x = 64 + 11

15x = 75

x = 75/15

x = 5