Question

alguém pfv pfv mesmo mim ajuda Resolva as equações. 15 - 9x = 6. 2 + x/7= 4. 5/6× + 10 = 1/2 (× + 2) + 5. 4× + 26 = 8 - 5x. 3× - 7 = 5+7×/5. pfv amigos ​

Answer 1

Explicação passo-a-passo:

A)

15 — 9x = 6

—9x = 6 — 15

—9x = —9

x = —9/—9

x = —1

B)

2 + x/7 = 4

(14 + x)/7 = 4

14 + x = 28

x = 28 — 14

x = 14

C)

5/6x + 10 = 1/2

5/6x = 1/2 — 10

5 = (1/2—10).6x

6x/2 — 60x = 5

(6x — 120x)/2 = 5

—114x = 10 (multiplica a expressão por -1)

114x = -10

x = -10/114

x = -5/57

D)

(x + 2) + 5 .4x + 26 = 8 — 5x

x + 2 + 20x + 26 = 8 — 5x

21x + 5x = 8 — 28

26x = —20

x = —20/26

x = —10/13

E)

3x — 7 = 5 + 7x/5

3x — 7 = (25 + 7x)/5

(3x — 7).5 = 25 + 7x

15x — 35 = 25 + 7x

15x — 7x = 25 + 35

8x = 60

x = 60/8

x = 15/2

Espero ter ajudado bastante!)