Question

A)6(X+3)-2(X-5)=20

B)2(X-7)-1(5-X)=2

C)2(X-1)-1=8

D)2(X+3)=30

E)8-2(X+5)=5

F)3(Y-1)-4(Y-2)=6

G)2(5Y+1)=27

H)2Y-3(Y-1)=8-2(Y-2)

i)6X-5(1-X)=10X+6

J)3(2X+4)=4(X+6)

《《《Sem querer me exibir muito, mais poderia deixar as contas montadas》》》

Answer 1

A) 6(x+3) - 2(x - 5) = 20

6x + 18 - 2x + 10 = 20

4x + 28 = 20

4x = 20 - 28

4x = - 8

$x =- \frac{8}{4}$

x = - 2

B) 2(x - 7) - 1(5 - X) = 2

2x - 14 - 5 + x = 2

3x - 19 = 2

3x = 2 + 19

3x = 21

$x = \frac{21}{3}$

x = 7

C) 2(x - 1) - 1 = 8

2x - 2 - 1 = 8

2x - 3 = 8

2x = 8 + 3

2x = 11

$\bf{x - \frac{11}{2}}$

D) 2(x + 3) = 30

2x + 6 = 30

2x = 30 - 6

2x = 24

$x =\frac{24}{2}$

x = 12

E) 8 - 2(x + 5) = 5

8 - 2x - 10 = 5

- 2x - 2 = 5

- 2x = 5 + 2

- 2x = 7 · (- 1)

2x = - 7

$\bf{x =- \frac{7}{2}}$

F) 3(y - 1) - 4(y - 2) = 6

3y - 3 - 4y + 8 = 6

- y + 5 = 6

- y = 6 - 5

- y = 1 · (- 1)

y = - 1

G) 2(5y + 1) = 27

10y + 2 = 27

10y = 27 - 2

10y = 25

y = \frac{ {25}^{\color{red} { \div 5}} }{ {10}^{\color{red} { \div 5}} } \\ \\ \bf{y = \frac{5}{2} }

H) 2y - 3(y - 1) = 8 - 2(y - 2)

2y - 3y + 3 = 8 - 2y + 4

- y + 3 = 12 - 2y

- y + 2y = 12 - 3

y = 9

i) 6x - 5(1 - x) = 10x + 6

6x - 5 + 5x = 10x + 6

11x - 5 = 10x + 6

11x - 10x = 6 + 5

x = 11

J) 3(2x + 4) = 4(x + 6)

6x + 12 = 4x + 24

6x - 4x = 24 - 12

2x = 12

$x =\frac{12}{2}$

x = 6

Espero ter ajudado! :)