Question

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
f)3x + 1=76
g)3x - 2=16
h)4x + 1=33
i)7x - 1=41
j)5x -10=80

Answer 1

a) 2x + 1 = 7
   2x = 7 - 1
   2x = 6
    x = 6/2
    x = 3

b) 5x - 2 = 8
    5x = 8 + 2
    5x = 10
     x = 10/5
     x = 2


c) 2x + 1 = 15
   2x = 15 - 1
   2x = 14
    x = 14/2
    x = 7


d) 6x - 3 = 9
   6x = 9 + 3
   6x = 12
    x = 12/6
    x = 2


e) 5x - 2 = 23
    5x = 23 + 2
    5x = 25
     x = 25/5
     x = 5


f) 3x + 1 = 76
   3x = 76 - 1
   3x = 75
    x = 75/3
    x =25


g) 3x - 2 = 16
    3x = 16 + 2
    3x = 18
     x = 18/6
     x = 3


h) 4x + 1 = 33
    4x = 33 - 1
    4x = 32
     x = 32/4
     x = 8


i) 7x - 1 = 41
   7x = 41 + 1
   7x = 42
    x = 42/7
    x = 6


j) 5x - 10 = 80
   5x = 80 + 10
   5x = 90
    x = 90/5
    x = 18



Espero que tenha ajudado.