Resposta:

A) X = -10

B) X= -2

C) X= -10

D) X= 4

E) X= 2,33...

F) X = 7

G) X= 10

H) X= 3

I) Y= 0,4

J) Y= -15

K) X= 9

L) X= 11

M) X= -6

Explicação passo-a-passo:

A) X= 2x + 10

x - 2x = 10

-x= 10

(-x = 10 ) . (-1)

X = -10

B) 4x+16= -2x+4

4x + 2x = 4 - 16

6x = -12

x= -12/6

x= -2

C) 3x + 6 = x - 14

3x - x = -14 - 6

2x = -20

x = -20/2

x= - 10

D) 7x + 3 = 2x + 23

7x - 2x = 23 - 3

5x = 20

x = 20/5

x= 4

E) x + 7 = 4x

x - 4x = -7

-3x=-7

(-3x = -7) .(-1)

3x = 7

x = 7/3

x = 2,33333.....

F) 5x - 40 = 2 - x

5x + x = 2 + 40

6x = 42

x= 42/6

x = 7

G) 2x + 1 = x + 11

2x - x = 11 - 1

x = 10

H) 5x - 7 - 2x - 2 = 0

5x - 2x = 7 + 2

3x = 9

x = 9/3

x= 3

I) 9Y - 4 = 2 - 6Y

9Y + 6Y = 2 + 4

15Y = 6

Y= 6/15

Y = 0,4

J) 2Y + 12= Y - 3

2y - y = -3 - 12

y = - 15

K) 2x - 5 = 13

2x = 13 + 5

2x = 18

x = 18/2

x = 9

L) 8x - 6 = 7x + 5

8x - 7x = 5 + 6

x = 11

M) 5x - 10 = 6x - 4

5x - 6x = -4 + 10

- x = 6

(-x = 6 ) . (-1)

x = - 6

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