Question

resolva sendo u=q a)16-x=x+25 b) 9x-7=5x+13 c)2×(2x+5x-1)-6×(1-2x)=2×(4x-5

Answer 1

a)

16- x= x+25

-x-x=25-16

-2x=9

x=9/-2

x=- 9/2

b) 9x-7=5x+13

9x-5x=13+7

4x=20

x=20/4

x=5

c)

2.(2x+5x-1)-6.(1-2x)=2.(4x-5)

2.(7x-1)-6.(1-2x)=8x-10

14x+12x-2-6=8x-10

26x-8=8x-10

26x-8x=-10+8

-18x=-2

x=-2/-18

x=1/9

espero ter ajudado!

boa noite!

Answer 2

Resposta:

a) V = {-9/2}

b) V = {5}

c) V = {-1}

Explicação passo-a-passo:

a)16-x=x+25

- x - x = 25 - 16

-2x = 9

x = 9/-2

x = - 9/2

b) 9x-7=5x+13

9x - 5x = 13 + 7

4x = 20

x = 20/4

x = 5

c)2×(2x+5x-1)-6×(1-2x)=2×(4x-5)

2(7x - 1) - 6 + 12x = 8x - 10

14x - 2 - 6 + 12x = 8x - 10

26x - 8x = - 10 - 8

18x = - 18

x = -18/18

x = - 1