Question

preciso urgente dos cálculos​

Answer 1

a) 7x - 3 = 4

7x = 4 + 3

7x = 7

x = 7/7

x = 1

b) x + 5 + 2x = -4

3x + 5 = -4

3x = -4 -5

3x = -9

x = -9/3

x = -3

c) 20x - 4 = 5x

20x = 5x + 4

20x - 5x = 4

15x = 4

x = 4/15

d) 6x - 4 = 2x + 8

6x - 2x = 8 + 4

4x = 12

x = 12/4

x = 3

e) 17x - 2 + 4 = 10 + 5x

17x - 5x = 10 - 4 + 2

12x = 8

x = 8/12 ou 2/3

f) 9x - 2 = 4x +18

9x - 4x = 18 + 2

5x = 20

x = 20/5

x = 4

g) 4x - 18 + 3x = 10

7x = 10 +18

7x = 28

x = 28/7

x = 4

h) 2x +1 = 3 - 3x + 16

2x + 3x = 3 +16 - 1

5x = 18

x = 18/5