Question

URGENTE: RESOLVA AS EQUAÇÕES.

a) x - x/2 = 1
b) x/3 + x/2 = 15
c) 3x/2 - 5x = -7
d) x/2 + x/4 + x/2 = 4
e) 3/4x - 1/2x = -2

Answer 1

a)x - x/2 =1
MMc = 2
x/1/2 - x/2/1 = 1/1/2
2x - x = 2
x = 2

b)x/3 + x/2 = 15
MMC = 6
x/3/2 + x/2/3 = 15/1/6
2x + 3x = 90
5x = 90
x = 90/5
x = 18

c) 3 x/2 - 5 x = -7
MMC = 2
3x/2/1 - 5x/1/2 = -7/1/2
3x - 10x = -14
- 7x = -14 ( X - 1)
7x = 14
x = 14/7
x = 2

d) x/2 + x/4 + x/2 = 4
MMC de 2 e 4 = 4
x/2/2 + x/4/1 + x/2/2 = 4/1/4
2x + x + 2x = 16
5 x = 16
x = 16/5