Question

A)3.(x-5)=2.(x+2)

B) 2x-(x-1)=0

C) 7-(2x-2)=2.(x+8)

D) x +x/5=12

Answer 1

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

3x - 15 = 2x + 4

3x - 2x = 4 + 15

x = 19

B) 2x - (x-1) = 0

2x - x + 1 = 0

x + 1 = 0

x = -1

C) 7 - (2x-2) = 2(x+8)

7 - 2x + 2 = 2x + 16

9 - 2x = 2x + 16

-2x - 2x = 16 - 9

-4x = 7

x = - 7/4 = -1,75

D) x + x/5 = 12

5x + x = 60

6x = 60

x = 60/6

x = 10

Answer 2

a) 3(x-5) = 2(x+2)

3x - 15 = 2x + 4

3x - 2x = 4 + 15

x = 19

b) 2x - (x-1) = 0

2x - x + 1 = 0

x + 1 = 0

x = -1

c) 7 - (2x-2) = 2(x+8)

7 - 2x + 2 = 2x + 16

9 - 2x = 2x + 16

-2x - 2x = 16 - 9

-4x = 7

x = - 7/4 ou -1,75

d) x + x/5 = 12 (o 5 multiplica)

5x + x = 60

6x = 60

x = 60/6

x = 10