Question

7) Encontre a raiz das equações abaixo:
a) 20x - 4 = 5x
b) 4x = -8x + 36
c) x - 3=5
d) x+2=7
e) 6x-4 = 2x + 8
f) 17x - 2 + 4 = 10 + 5x
g) 4x - 10 = 2x + 2
h) 5x + 6x - 16 = 3x + 2x - 4
i) x - 109 = 5​.

Answer 1

Explicação passo-a-passo:

a) 20x -5x = 4

15x = 4

x= 4/15

b) 4x +8x = 36

12x = 36

x= 36/12

x= 3

c) x = 5 +3

x= 8

d) x= 7-2

x= 5

e) 6x -2x= 8+4

4x = 12

x= 12/4

x= 3

f) 17x +2 = 5x +10

17x -5x = 10 -2

12x = 8

x= 8/12

x= 2/3

g) 4x -2x = 2 +10

2x = 12

x= 12/2

x= 6

h) 11x - 16 = 5x -4

11x - 5x = - 4 +16

6x = 12

x= 12/6

x= 2

i) x = 5 + 109

x= 114