Question

equaçoes do 1º grau:
a) x + 12 = 25 f) 6x + 36 = 2x – 4
b) x + 17 = – 9 g) 14x + 4 = 12x + 36
c) x – 34 = 20 h) 8x – 35 = 2x + 13
d) x – 14 = – 89 i) 55x + 25 = 35x – 95
e) x + 124 = – 45 j) 9x + 24 + 15 = 8x + 12 – 5

Answer 1

a) x + 12 = 25

x = 25 - 12

x = 13

b) x + 17 = - 9

x = - 9 - 17

x = - 26

c) x - 34 = 20

x = 20 + 34

x = 54

d) x - 14 = - 89

x = - 89 + 14

x = - 75

e) x + 124 = - 45

x = - 45 - 124

x = - 169

f) 6x + 36 = 2x - 4

6x - 2x = - 4 - 36

4x = - 40

x = - 10

g) 14x + 4 = 12x + 36

14x - 12x = 36 - 4

2x = 32

x = 16

h) 8x - 35 = 2x + 13

8x - 2x = 13 + 35

6x = 48

x = 8

i) 55x + 25 = 35x - 95

55x - 35x = - 95 - 25

20x = - 120

x = - 6

j) 9x + 24 + 15 = 8x + 12 - 5

9x - 8x = 7 - 39

x = - 32