Question

Resolva as seguintes equaçoes
A) 2x+12=8
B) x-5=-8+2x
C) x+4=-6
D) 6x-20=-2x-12
E) 2x+6=0
F) 3x+15=0
G) 2x-4=0
H) 20=5x
I) 12=4x
J) 5x+3=-3x+5

2-resolva as seguintes equações
A) (2x²+3x)+(5x²+6x+2)
B) (5x²+4)-(2x²-2x+5)
C) 3(x+y)
D) (x+4).(x+6)
E) (12x/6-8x⁴)÷(3x)
F) (15x⁴+12x)÷(4x)
G) (4x-3)×(2x-2)
H) (5x-4y+3)-(4x+2y+5)
I) (7x²+2x-5)+(3x²-5x+3)
J) (5x²+6y+3)+(2x²+3y)

Answer 1

a) 2x=8-12

x= -4/2

x= -2

b) x - 2x = 5 - 8

- x = - 3 (-1)

x = 3

c) x = -6 - 4

x= - 10

d) 6x + 2x = 20 - 12

8x = 8

x = 8/8

x = 1

e) 2x = -6

x = -6/2

x = -3

f) 3x = -15

x = -15/3

x = -5

g) 2x = 4

x = 4/2

x = 2

h) -5x = - 20 (-1)

x = 20/5

x = 4

i) -4x = -12 (-1)

x = 12/4

x = 3

j) 5x + 3x = 5-3

8x = 2

x = 2/8 : 2

x = 1/4