Question

1) Resolva as equações de 1° grau
a) x- 7 =0
b) 3x+ 12 0
c) 5x-40 2- x
d) 20 + 6x = -2x + 26
e) 5x - 4 = 10
)-4x = 8
9)-5X=-12
h) -3x = 10
i) -7x = 14​

Answer 1

Resposta:

a) x- 7 =0

x= 7

b) 3x+ 12 0

3x= -12

x= -12/3

x=-4

c) 5x-40= 2- x

5x+x= 2+40

6x=42

x=42/6

x=7

d) 20 + 6x = -2x + 26

6x +2x= 26-20

8x= 6

x=6/8=3/4

e) 5x - 4 = 10

5x= 10+4

x=14/5

f)-4x = 8

x= 8/(-4)

x=-2

9)-5X=-12

x= (-12)/(-5)

x=12/5

h) -3x = 10

x= 10/(-3)

x= - 10/3

i) -7x = 14

x= 14/(-7)

x= -2