Question

Encontre o valor de x?
a) x+1 = 3
b) x-1 = 2
c) 2x + 2 = 6
d) 2x - 3 = 5
e) 4 = 2x
f) 2x+1 = x+3
g) 5x-5 = 20
h) 2x = 6
i) 2x + 3 = 5 - X
j) 4 = 2x + 2

Answer 1

• Equação do 1° grau.

a) x+1 = 3

x = 3-1

x = 2

b) x-1 = 2

x = 2+1

x = 3

c) 2x + 2 = 6

2x = 6+2

x = 8/2

x = 4

d) 2x - 3 = 5

2x = 5+3

x = 8/2

x = 4

e) 4 = 2x

x = 4/2

x = 2

f) 2x+1 = x+3

2x - x = 3 - 1

x = 2

g) 5x-5 = 20

5x = 20+5

x = 25/5

x = 5

h) 2x = 6

x = 6/2

x = 3

i) 2x + 3 = 5 - X

2x + x = 5 - 3

3x = 2

x = 2/3

j) 4 = 2x + 2

2x = 4-2

x = 2/2

x = 1