Question

A)×/4+2×=-3
B)×-3/4-2×-1/5=-1
C)2/3 (1-y)-1/2=y/6

Ajude por favor

Answer 1

A) X= 12/7
B) X= 1
C) Y = -1

Answer 2

A)
X + 2X = - 3
__
.4

X + 8X = - 3
_____
.....4

X + 8X = - 3 (4)

9X = - 12

X = - 12
........___...(÷3)
...........9

X = - 4
.......___
..........3


B)
X - 3 - 2X - 1 = - 1
___...._____
...4...........5

4 - 5|2
2 - 5|2
.1 - 5|5
.1 -..1|
m.c.m= 2x2x5
m.c.m=4x5
m.c.m=20

5X - 25 - 8X - 4 = - 1
____________
.............20

5X - 8X - 25 - 4 = - 1 (20)

- 3X - 29 = - 20

-3X = - 20 + 29

- 3X = 9

X = - 9
......___
.........3

X = - 3


C)
2 (1 - y) - 1 = y
_.............._..._
3..............2...6

2 - 2y - 1 = y
_...__..._.....__
3....3.....2......6

3-3-2|2
3-3-.1|3
.1-.1-.1
m.c.m= 2x3
m.c.m=6

4 -4y - 3 = y
______....___
.......6............6

6(4 - 4y - 3) = 6y

24 - 24y - 18 = 6y

- 24y - 6y = - 24 + 18

- 30y = - 6..(-1)

30y = 6

y = 6
.....___...(÷2)
......30

y = 3
.....___..(÷3)
.......15

y = 1
.....__
.......5