Question

Encontre o valor da incógnita x
a) 4 x -1 = 11
b) 9 x + 6 = 8x
c) 3 x - 1 = x
d) 11 x + 12 = 9x + 13
e) x - 3 = 0
f) x + 5 = 11

Answer 1

a) 4x - 1 = 11

4x = 11 + 1

4x = 12

x = 12

---

4

x = 3

b) 9x + 6 = 8x

9x - 8x = - 6

x = - 6

c) 3x - 1 = x

3x - x = 1

2x = 1

x = 1

---

2

d) 11x + 12 = 9x + 13

11x - 9x = 13 - 12

2x = 1

x = 1

---

2

e) x - 3 = 0

x = 0 + 3

x = 3

f) x + 5 = 11

x = 11 - 5

x = 6