Question

1. Determine a raiz das seguintes equações:
a) 2x +3.(x - 5) = 4x + 9
b) 10x - 5.(-1 + x) = -3.(2x - 2) + 4.(5 + x)
d) 5.(x – 3) - 4.(x + 2) = -2 +3.(-1 - 2x)
c) 3.(x - 1) - 1.(x – 3) +5.(x - 2) = 18
f)5.(x + 1) +6.(x + 2) = 9.(x + 3)
e) 3.(5 - x) - 3.(1 - 2x) = 42

me ajudemmm por favor ​

Answer 1

Resposta:

a)x=24

b)x=3

c)x=2

d)x=-0,8

e)x=9

f)x=5

Explicação passo-a-passo:

a)2x +3.(x - 5) = 4x + 9

2x+3x-15=4x+9

2x+3x-4x=9+15

x=24

b)10x - 5.(-1 + x) = -3.(2x - 2) + 4.(5 + x)

10x+5-5x=-6x+6+20+4x

10x-5x-4x+6x=20+6-5

7x=21

x=21/7

x=3

c)3.(x - 1) - 1.(x – 3) +5.(x - 2) = 18

3x-3+x+3+5x-10=18

3x+x+5x=18+3-3

9x=18

x=18/9

x=2

d)5.(x – 3) - 4.(x + 2) = -2 +3.(-1 - 2x)

5x+15-4x-8=-2+3-6x

5x-4x+6x=3-2+8-15

7x=-6

x=-6/7

x=-0,8

e)3.(5 - x) - 3.(1 - 2x) = 42

15-3x-3+6x=42

-3x+6x=42-15

3x=27

x=27/3

x=9

f)5.(x + 1) +6.(x + 2) = 9.(x + 3)

5x+5+6x+12=9x+27

5x+6x-9x=27-5-12

2x=10

x=10/2

x=5

Espero ter ajudado e bons estudos:)