Question

me ajudem pfvv tenho q fazer hj
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Answer 1

Explicação passo-a-passo:

A) 4x + 5 = 21

4x = 21 - 5

4x = 16

16/4

x = 4

B) 2x - 1 = 11

2x = 11 + 1

2x = 12

12/2

x = 6

C) 3 + 2x = 2

2x = 2 - 3

2x = - 1

x = - 1/2

D) 20 + x = 20

x = 20 - 20

x = 0

E) 7x - 4 = 5x + 6

7x - 5x = 6 + 4

2x = 10

10/2

x = 5

F) 10 + 3x = 2x + 9

3x - 2x = 9 - 10

x = - 1

G) 5y - 13 = 7y - 19

5y - 7y = - 19 + 13

- 2y = - 6 ( 1x )

2y = 6

6/2

y = 3

H) 10x - 3 = 8x

10x - 8x = 3

2x = 3

x = 3/2

i) 4 ( x - 2 ) - 2 ( x - 1 ) = 4

4x - 8 - 2x + 2 = 4

2x - 6 = 4

2x = 4 + 6

2x = 10

10/2

x = 5

J) 2 ( x - 3 ) = 6

x - 3 = 3

x = 3 + 3

x = 6

espero ter ajudado kk