Question

Podem me ajudar, preciso dos cálculos que cheguem a essas respostas

1) -18 = 2x + 15 V= Ø

2) y/2 + y/3 = 3y/4 - 6 V= -72

3) x-1/5 - x = 5-2x/3 V= -14

4) 4x+1/3 + 2(x + 1)/3 = 5(3x + 2)/4 V= - 6/7

5) ½ (2x/3 + ¼) = 1/3 (1/2 – x) V= 1/16

6) 3(x-2)/2 - x -3/4 = 2x - 1 V= - 5/3

7) 2(x/5 + 1/4) = 3/8 V= - 5/16

8) 5 + 1/2 (x/4 + 4) = 1/4 (2x - 5) V= 22

Answer 1

Boa tarde Vaker 

1) -18 = 2x + 15 

2x = -18 - 15 = -33
x = -33/2 

2) y/2 + y/3 = 3y/4 - 6 

6y/12 + 4y/12 = 9y/12 - 72/12 

10y - 9y = -72
y = -72 

3) (x-1)/5 - x = (5 - 2x)/3 

3x - 3 - 15x = 25 - 10x
12x - 10x = -3 - 25
2x = -28
x = -14

4) (4x + 1)/3 + 2*(x + 1)/3 = 5*(3x + 2)/4 

(4x + 1 + 2x + 2)/3 = (15x + 10)/4
(6x + 3)/3 = (15x + 10)/4
24x + 12 = 45x + 30
21x = -18
x = -6/7 

5)  1/2*(2x/3 + 1/4) = 1/3 (1/2 - x) 

2x/6 + 1/8 = 1/6 - x/3
x/3 + 1/8 = 1/6 - x/3
2x/3 = 1/6 - 1/8
2x/3 = 2/48 = 1/24
2x = 1/8
x = 1/16 
 
6) 3(x - 2)/2 - (x - 3)/4 = 2x - 1 

3x/2 - 3 - x/4 + 3/4 = 2x - 1
6x/4 - 12/4 - x/4 + 3/4 = 8x/4 - 4/4
5x - 9 = 8x - 4
3x = -5
x = -5/3

7) 2(x/5 + 1/4) = 3/8 

2x/5 + 1/2 = 3/8
16x + 20 = 15
16x = -5
x = -5/16 

8) 5 +  (x/4 + 4)/2 = (2x - 5)/4

5 + (x/4 + 16/4)/2 = (2x - 5)/4
40/8 + x/8 + 16/8 = 4x - 10/8
x + 56 = 4x - 10
3x = 66
x = 22