Question

resolva estas equações :

a) x + 5 = 3
b) x + 4 = 4
c) 4 x = 2
d) 2 x + 1 = 3
e) 3 x = 15
f) 3 x = 1
g) x/3 = 1
h) x + 1/3 = 1
i) 1 - x = 2​

Answer 1

a) x + 5 = 3

x = 3 - 5

x = - 2

b) x + 4 = 4  

x = 4 - 4

x = 0

c) 4 x = 2

x = 2/4

x = 1/2

d) 2 x + 1 = 3

2x = 3 - 1

2x = 2

x = 2/2

x = 1

e) 3 x = 15

x = 15/3

x = 5

f) 3 x = 1  

x = 1/3

g) x/3 = 1  

x = 3 * 1

x = 3

h) x + 1/3 = 1

x = 1 - 1/3

x = 3/3 - 1/3

x = 2/3

i) 1 - x = 2​

x = 1 - 2

x = - 1