Question

7. Resolva as equações a seguir encontrando o valor de X.

a) x + x + x = 87
b) x - 2x + 4x = 81
c) 47 + 38 + x = 110
d) - 47x = 611
e) - 10x = - 10​

Answer 1

Resposta:

a )

3x = 87

x = 87/3

x= 29

b)

x -2x +4x = 81

-1x +4x = 81

+ 3x= 81

x = 81/3

x= 7/1

c)

47 + 38 +x =110

x = 110 -47-38

x= 110-85

x= 25

d)

-47x = 611

x = 611/47

x= 13

e)

-10x = -10

x= -10 +10

x= 0