Question

Resolva as equações
(A) 3x -7 = 2X +5
(B) 7X +8 = 4X -10
(C) 4X -15 = -2x +3
(D) 2X -4 - 8 = 4X
(E) 3X = X +1 + 7
(F) 360 + 36 X = 30 X
(G) 2X +5 -5x = -1
(H) 5+ 6X = 5X +2
(I) X + 2X -1 - 3 = X
(J) -3X +10 = 2X +8 + 1

Answer 1

(A) 3x -7 = 2X +5

3x - 2x = 5 + 7

x = 12

(B) 7X +8 = 4X -10

7x - 4x = - 10 - 8

3x = - 18

x = - 18/3

x = - 6

(C) 4X -15 = -2x +3

4x + 2x = 3 + 15

6x = 18

x = 18/6

x = 3

(D) 2X -4 - 8 = 4X

2x - 12 = 4x

4x - 2x = - 12

2x = - 12

x = - 12/2

x = - 6

(E) 3X = X +1 + 7

3x - x = 8

2x = 8

x = 8/2

x = 4

(F) 360 + 36 X = 30 X

36x - 30x = - 360

6x = - 360

x = - 360/6

x = - 60

(G) 2X +5 -5x = -1

- 3x + 5 = - 1

3x = 5 + 1

3x = 6

x = 6/2

x = 3

(H) 5+ 6X = 5X +2

6x - 5x = 2 - 5

x = - 3

(I) X + 2X -1 - 3 = X

3x - 4 = x

3x - x = 4

2x = 4

x = 4/2

x = 2

(J) -3X +10 = 2X +8 + 1

3x + 2x = 10 - 8 - 1

5x = 1

x = 1/5