Question

1) Resolva as equações do 1º grau:
a) 5x + 18= 33
b) 10x +21 - 7= 10 + 8x
c) -5x = -9x + 24
d) 7x-29 = 13
e) 4x+10=45-3x​

Answer 1

Resposta:

a) x = 3

b) x = - 2

c) x = 6

d) x = 6

e) x = 5

Explicação passo a passo:

a)

5x + 18 = 33

5x = 33 - 18

5x = 15

x = 15 / 5

x = 3

b)

10x + 21 - 7 = 10 + 8x

10x - 8x = 10 - 21 + 7

2x = - 11 + 7

2x = - 4

x = - 4 / 2

x = - 2

c)

- 5x = - 9x + 24

- 5x + 9x = 24

4x = 24

x = 24 / 4

x = 6

d)

7x - 29 = 13

7x = 13 + 29

7x = 42

x = 42 / 7

x = 6

e)

4x + 10 = 45 - 3x​

4x + 3x = 45 - 10

7x = 35

x = 35 / 7

x = 5