Question

Preciso urgente da conta dessa equação... ( mmc com conta) por favor !

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
2x-x=2
х=2
***************
2 - 2/2 = 1
2 - 1 = 1
1 = 1

b)x/3+x/2=15
2х + 3х = 90
5х = 90
х = 90 : 5
х = 18
******************
18/3 + 18/2 = 15
6 + 9 = 15
15 = 15

c)3x/2-5x=-7
3х - 10х = - 14
- 7х = - 14
7х = 14
х = 14 : 7
х = 2
***********************
3×2/2 - 5× 2 = - 7
3×1 - 10 = -7
- 7 = - 7

d)x/2+x/4+x/2=4
2х + х + 2х = 16
5х = 16
х = 16 : 5
х = 3,2
****************
3,2/2 + 3,2/4 + 3,2/2 = 4
1,6 + 0,8 + 1,6 = 4
    4 = 4

e)3/4x-1/2x=-2
3х - 2х = - 8
х = - 8
******************
3/4×(-8) - 1/2×(-8) = - 2
- 6 - (-4) = - 2
-6 + 4 = - 2
-2 = -2