Question

2) Encontre a raiz das equações:
a) 2x + 3 = x + 17
b) 5x – 10 = 4x + 80
c) 8x + 15 = 7x + 35
d) 5x + 6 = 6x + 12
e) 3x – 9 = 4x – 12
f) 2x + 15 = 3x – 45

Answer 1

a) 2x + 3 = x + 17

2x - x = 17 - 3

x = 14

b) 5x – 10 = 4x + 80

5x - 4x = 80 + 10

x = 90

c) 8x + 15 = 7x + 35

8x - 7x = 35 - 15

x = 20

d) 5x + 6 = 6x + 12

5x - 6x = 12 - 6

-x = 6 (.-1)

x = -6

e) 3x – 9 = 4x – 12

3x - 4x = -12 + 9

-x = -3 (.-1)

x = 3

f) 2x + 15 = 3x – 45

15 + 45 = 3x - 2x

60 = x

Answer 2

a) X = 15

b) X = 90

c) X= 20

d) X= -6

e) X= 3

f) X= 60

espero ter ajudado ^^