Question

podrian ayudarme con estos prblemas de matematicas

Answer 1

Respuesta:

a)

7x = n

x = n/7

b)

-10x = y + 20

x = - (y + 20)

10

c)

10x + 2y = 40

10x = 40 - 2y

x = 40 - 2y

10

d)

5x + 4 = 2x - 2

5x - 2x = -4 - 2

3x = -6

x = -6/3

x = -2

e)

4x + 1 = n

3

4x + 1 = 3n

4x = 3n - 1

x = 3n - 1

4

f)

5(2x + 6) = 1

10x + 30 = 1

10x = 1 - 30

10x = -29

x = -29

10

g)

$\sqrt{7x - y} = n$

${( \sqrt{7x - y} )}^{2} = {(n)}^{2} \\ 7x - y = {n}^{2} \\ 7x = {n}^{2} + y \\ x = \frac{ {n}^{2} + y}{7}$