Question

4°)Calcule o valor de x:
a) 2x + 1 = 7 
b) 5x -2 = 8 
c) 2x + 1 = 15 
d) 6x - 3 = 9 
e) 5x - 2 = 23 
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Answer 1

Resposta:

Explicação:

A) x4

B)x2

C)x7

D)x2

E)x5

Answer 2

A)2x+1=7

2x=7+1

x=8÷2=4

B)5x-2=8

5x=8+2

5x=10

x=10÷5=2

C)2x+1=15

2x=15+1

2x=16

x=16÷2=8

D)6x-3=9

6x=9+3

6x=12

x=12÷6=2

e)5x-2=23

5x=23+2

5x=25

x=25÷5=5