Question

1- Resolva as equações: a) 2x + 13 = 21 b) 3x − 5 = 10 c) x + 12 = 3 d) x − 4 = 17 e) 7x + 4 = 25 f) 4x + 9 = 1 g) 7x − 8 = −22 h) 5x − 50 = 0​

Answer 1

Resposta:

a) x=10.

b) x=5.

c) x= -9.

d) x=21.

e) x=3.

f) x= -2.

g) x= -2.

h) x=10.

Explicação passo a passo:

a) 2x+1=21

2x=21-1

2x=20

x=20/2

x=10

b) 3x-5=10

3x=10+5

3x=15

x=15/3

x=5

c) x+12=3

x=3-12

x= -9

d) x-4=17

x=17+4

x=21

e) 7x+4=25

7x=25-4

7x=21

x=21/7

x=3

f) 4x+9=1

4x=1-9

4x= -8

x= -8/4

x= -2

g) 7x-8= -22

7x= -22+8

7x= -14

x= -14/7

x= -2

h) 5x-50=0

5x=50

x=50/5

x=10