Question

ayuda porfis es para mañana con procedimiento
doy corona​

Answer 1

EJERCICIO 1

3x = 4y

5x - 6y = 38

x = (4y)/3

5x = 38 + 6y

x = (38 + 6y)/5

4y/3 = (38 + 6y)/5

(4y)(5) = (38 + 6y)(3)

20y = 114 + 18y

20y - 18y = 114

2y = 114

y = 114/2

y = 57

3x = 4y

3x = 4(57)

3x = 228

x = 228/3

x = 76

*Comprobación*

5x - 6y = 38

5(76) - 6(57) = 38

380 - 342 = 38

38 = 38

La respuesta es correcta**

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5a + 2b = 15

2a + b = 5

2a + b = 5

2a = 5 - b

a = (5 - b)/2

5a + 2b = 15

5a = 15 - 2b

a = (15 - 2b)/5

(5 - b)/2 = (15 - 2b)/5

(5 - b)(5) = (15 - 2b)(2)

25 - 5b = 30 - 4b

25 - 30 = -4b + 5b

b = -5

5a + 2b = 15

5a + 2(-5) = 15

5a - 10 = 15

5a = 15 + 10

5a = 25

a = 25/5

a = 5

*Comprobación*

2a + b = 5

2(5) -5 = 5

10 - 5 = 5

5 = 5

La respuesta es correcta**

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x/3 + y/4 = 6

3x - 4y = 4

x/3 + y/4 = 6

4x/12 + 3y/12 = 6

4x + 3y = 6(12)

4x + 3y = 72

4x + 3y = 72

3x - 4y = 4

4x = 72 - 3y

x = (72 - 3y)/4

3x = 4 + 4y

x = (4 + 4y)/3

(72 - 3y)/4 = (4 + 4y)/3

(72 - 3y)(3) = (4 + 4y)(4)

216 - 9y = 16 + 16y

216 - 16 = 16y + 9y

200 = 25y

y = 200/25

y = 8

3x - 4y = 4

3x - 4(8) = 4

3x - 32 = 4

3x = 4 + 32

3x = 36

x = 36/3

x = 12

*Comprobación*

4x + 3y = 72

4(12) + 3(8) = 72

48 + 24 = 72

72 = 72

La respuesta es correcta**

EJERCICIO 2

x + y = 45

x - y = 21

x = 45 - y

x = 21 + y

45 - y = 21 + y

45 - 21 = y + y

24 = 2y

y = 24/2

y = 12

x = 45 - y

x = 45 - 12

x = 33

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P = 22 cm

b = h + 5

P = 2h + 2b

22 = 2h + 2(h + 5)

22 = 2h + 2h + 10

22 = 4h + 10

22 - 10 = 4h

12 = 4h

h = 12/4

h = 3

b = h + 5

b = 3 + 5

b = 8