Question

as equaçoes abaixo:
a) x- 3 =
b) 4x - 9 = 1 - 2x
c) x + 5 = 20 - 4x
d) 9x - 4x + 10 = 7x - 30​

Answer 1

Resposta:

x-3=0

x=0-3

x= -3

4x-9=1-2x

4x+2x=1+9

6x=10

x=10/6

x= 1,66

x+5=20-4x

x+4x=20-5

5x=15

x=15/5

x= 3

9x-4x+10=7x-30

9x-4x-7x=-30-10

-2x=-40 (-1)

2x=40

x=40/2

x= 20

Answer 2

Resposta:

x-3=

x=3

4x-9=1-2x

4x + 2x= 1+9

6x=10

x= 10/6

x= 5/3

x+5=20 -4x

x + 4x = 20-5

5x = 15

x= 15/5

x= 3

9x-4x + 10 = 7x - 30

5x - 7x = -30 - 10

-2x = -40

x = -40/-2

x =20