Question

ayúdenme con estas cuentas
2x - 12 : 3 = x + 3²
8⁰ + 4x = 2x + 49 : 7
6x - 10 = 4x + 3 . 4
5x + 12 : 6 = x + 2 . 5
7 + x + 22 = ( 15x + 25 ) : 5
( x + 4 ) . 9 + x + 4 = 100
3 . ( x + 2 ) = 2 . ( x + 4 )
8 . ( x + 1 ) = 4 . ( x + 3 )
6 . ( 3x + 5 ) = 3 . ( 20 + x )

Answer 1

Respuesta:

1) 2X - 4 = X + 9

2X - X = 9 + 4

X = 13

2) 1 + 4X = 2X + 7

4X - 2X = 7 + 1

2X = 8

X = 8 : 2

X = 4

3) 6X - 10 = 4X + 12

6X - 4X = 12 + 10

2X = 22

X = 22 : 2

X = 11

4) 5X + 2 = X + 10

5X - X = 10 - 2

4X = 8

X = 8 : 4

X = 2

5) 7 + X + 22 = (15X + 25) : 5

7 + X + 22 = 3X + 5

7 + 22 - 5 = 3X - X

24 = 2X

24 : 2= X

12 = X

6) x + 4 . 9 + x + 4 = 100

x + 36 + x + 4 = 100

x + x = 100 - 36 - 4

2x = 60

x = 60 : 2

x = 30

7) 3 . ( x + 2 ) = 2 . ( x + 4 )

3x + 6 = 2x + 8

3x - 2x = 8 - 6

x = 2

8) 8 . ( x + 1 ) = 4 . ( x + 3 )

8x + 8 = 4x + 12

8x - 4x = 12 - 8

4x = 4

x = 4 : 4

x = 1

9) 6 . ( 3x + 5 ) = 3 . ( 20 + x )

18x + 30 = 60 + 3x

18x - 3x = 60 - 30

15x = 30

x = 30 : 15

x = 2