Question

Resolva as Equações:

A) -5m + 13 = 4(8-m)

B) 3y + 87 = 3 + 87y

C) 33x + 10 = 28x - 5

D) 2(x +3) = 30

E) 8 - 2(x +5) = 5

F) 3(y-1) - 4(y - 2) = 6

G) 3(2x +4) = 4(x+6)

H) 3x = -45 - 2x

I) 10x = 20 + 9x

Podem me ajudar?!​

Answer 1

A)

- 5m + 13= 4(8 - m)

- 5m + 13= 32 - 4m

- 5m + 4m= 32 - 13

- m= 19 >>.(-1)

m= - 19

B)

3y + 87= 3 + 87y

3y - 87y= 3 - 87

- 84y= - 84 >>.(-1)

84y= 84

y= 84/84

y= 1

C)

33x + 10= 28x - 5

33x - 28x= - 5 - 10

5x= - 15

x= - 15/5

x= - 3

D)

2(x + 3)= 30

2x + 6= 30

2x= 30 - 6

2x= 24

x= 24/2

x= 12

E)

8 - 2(x + 5)= 5

8 - 2x - 10= 5

- 2x= 5 - 8 + 10

- 2x= 7 >>.(-1)

2x= - 7

x= - 7/2

F)

3(y - 1) - 4(y - 2)= 6

3y - 3 - 4y + 8= 6

3y - 4y= 6 + 3 - 8

- y= 1 >>.(-1)

y= - 1

G)

3(2x + 4)= 4(x + 6)

6x + 12= 4x + 24

6x - 4x= 24 - 12

2x= 12

x= 12/2

x= 6

H)

3x= - 45 - 2x

3x + 2x= - 45

5x= - 45

x= - 45/5

x= - 9

I)

10x= 20 + 9x

10x - 9x= 20

x= 20