Question

Resolva as seguintes equações
f) 4x-7= 8x-2
g) 2x + 1 = 4x - 7
h) 3x = 15
i) 2x = 14
i) 4x= -12
k) 7x= -21
i) 13x = 13​

Answer 1

f) 4x-7= 8x-2

4x-8x= -2+7

-4x= 5

x= 5/-4

g) 2x+1= 4x-7

2x-4x= -7-1

-2x= -8

x= -8/ -2

x= 4

h) 3x= 15

x= 15/ 3

x= 5

i) 2x= 14

x= 14/2

x= 7

j) 4x= -12

x= -12/ 4

x= -3

k) 7x= -21

x= -21/ 7

x= -3

L) 13x= 13

x= 13/13

x= 1