Question

hola alguien me puede ayudar porfa?

ecuaciones

1) 4 X + 1 = 3 X + 9

2)6 X - 13 = 2 X + 9

3)10 X - 5 - 2 X = 9 + 5 X + 7

4) 4 X + 7 + X = 21 + 3 X

urgentemente para hoy me pueden ayudar.

Answer 1

1) 4x -1 = 3x+9

4x = 3x +9 +1

4x -3x = 9+1

1x = 10

Prueba:

4(x) -1 = 3(x) +9

4(10) -1 = 3 (10) +9

40 -1 = 30 +9

39 = 39

2) 6x -13 = 2x +9

6x = 2x +9 +13

6x -2x = 9+13

4x = 22

x = 22 ÷4

x = 5.5

Prueba:

6(x) -13 = 2(x) +9

6(5.5) -13 = 2(5.5) +9

33 -13 = 11+9

20 = 20

3) 10x -5 -2x = 9+ 5x +7

10x -2x = 9 + 5x +7 +5

10x -2x -5x = 9 +7 +5

8x -5x = 16 +5

3x = 21

x = 21 ÷ 7

x = 3

4) 4 X + 7 + X = 21 + 3 X

4x +x = -7 +21 + 3x

5x -3x = -7 +21

2x = 14

x = 14 ÷ 2

x = 7

4(x) +7 +(x) = 21 +3(x)

4(7) +7 +7 = 21 + 3(7)

28 +14 = 21 +21

42 = 42

Espero que te sirva.

:3