Question

a) 3(X + 4) = 15 b) 2(X – 6) = 18 c) 4(X – 2) = 24 d) 3(2x – 4) = 36 e) 4(3x + 6) = 48 f) 5(2x + 8) = 20 g) 4(x -7) = 48 h) 5(x + 7) = 80 i) 3( x -5) = 12 j) 2(x -3) +4(x -3) = 36 k) 3(x + 4) - 2(x +1) = 5 l) 6(x – 7) = 60

Answer 1

Resposta:

a) 3 (x + 4) = 15

x + 4 = 15/3

x + 4 = 5

x = 5 - 4

x = 1

b)2 (x - 6) = 18

x - 6 = 18/2

x - 6 = 9

x = 9 + 6

x = 15

c) 4 (x - 2) = 24

x - 2 = 24/4

x - 2 = 6

x = 6 + 2

x = 8

d) 3 (2x - 4) = 36

2x - 4 = 36/3

2x - 4 = 12

2x = 12 + 4

2x = 16

x = 16/2

x = 8

e) 4 (3x + 6) = 48

3x + 6 = 48/4

3x + 6 = 12

3x = 12 - 6

3x = 6

x = 6/3

x = 2

f) 5 (2x + 8) = 20

2x + 8 = 20/5

2x + 8 = 4

2x = 4 - 8

2x = - 4

x = -4/2

x = -2

g) 4 (x - 7) = 48

x - 7 = 48/4

x - 7 = 12

x = 12 + 7

x = 19

h) 5 (x+7) = 80

x + 7 = 8-/5

x + 7 = 16

x = 16 - 7

x = 9

i) 3 (x - 5) = 12

x - 5 = 12/3

x - 5 = 4

x = 4 + 5

x = 9

j) 2 (x - 3) + 4 (x - 3) = 36

2x - 6 + 4x - 12 = 36

6x - 18 = 36

6x = 36 + 18

6x = 54

x = 54/6

x = 9

k) 3 (x + 4) - 2 (x + 1) = 5

3x + 12 - 2x - 2 = 5

x + 10 = 5

x = 5 - 10

x = - 5

l) 6 (x-7) = 60

x - 7 = 60/6

x - 7 = 10

x = 10 + 7

x = 17